一、Dear sir/madam:  

    Im delighted you have accepted our invitation to speak at the Conference in [city] on [date].  

    As we agreed, youll be speaking on  the topic "" from [time] to [time]. There will be an additional minutes for questions. Would you please tell me what kind of audio-visual equipment youll need. If you could let me know your specific requirements by [date], I'll have plenty of time to make  sure that the hotel provides you with what you need.  

    Thank you again for agreeing to speak. I look forward to hearing from you. 

    Sincerely yours, 

    [name] 

    [title] 

    二、Dear sir/madam:  

     Thank you for your letter of [date].  

    Im glad that you are also  going to [place] next month. It would be a great pleasure  to meet you at the [exhibition/trade fair]. 

    Our company is having a reception at  [hotel] on the evening of [date] and I would be very pleased if you could attend. 

    I look forward to hearing from you soon. 

    Yours sincerely,  

    [name] 

    [title] 

    三、Dear sir/madam:  

    [organization] would very much like  to have someone from your  company speak at our conference on [topic].  

    As you may be aware, the mission of  our association is to promote . Many of our members are interested in the achievements your company has made in . 

    Enclosed is our preliminary schedule for the conference which will be reviewed in  weeks. Ill call you [date] to see who from your company would be willing to speak to  us. I can assure you that well make everything convenient to the speaker.  

    Sincerely yours, 

    [name] 

    [title] 

    四、Dear sir/madam:  

    We would like to invite you to an  exclusive presentation of our new [product]. 
    
    The presentation will take place at [location], at [time] on [date]. There will also be a reception at [time]. We hope you and your colleagues will be able to attend. [company] is a leading producer of high-quality . 

     As you well know, recent technological advances have made increasingly affordable to the public. Our new models offer superb quality and sophistication with  economy, and their new features  give them distinct advantages  over similar products from other manufacturers. 

    We look forward to seeing you on [date]. Just call our office at [phone number] and we will be glad to secure a place for you. 

    Sincerely yours, 

    [name] 

    [title] 

    五、Dear sir/madam:  

    On [date], we will host an evening of celebration in honor of the retirement  of  [name], President of [company]. You are cordially invited to attend the celebration  at [hotel], [location], on [date] from to p.m.
[name] has been the President of [company] since [year]. 

During this  period, [company] expanded its business from to . Now its our opportunity to thank him for his years of exemplary  leadership and wish him well for a happy retirement. Please join us to  say Good-bye to [name]. 

    See you on [date]. 

    Yours sincerely 

    [name] 

    [title] 

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