dear sir/madam：

　　thank you for your letter of [date]. i’m 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]