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sincerely, [name] [title] 三、Dear sir/madam: [organization] would very much like to have someone from your pany 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 pany 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 pany 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 [ti