Formal or ColloquialOnline version Chose 6 written or colloquial expressions by Mamen Benítez 1 Formal Written English 2 Informal Colloquial English Further to your letter of ... We propose ... I trust you will find the following points of interest. Could you please confirm the date? I would be very grateful i you could send me ... May I remind you that ... I got your letter about ... Why don't we ... ? Here's the information you wanted. Let me know when you have a definite date. Can you send me details on ... ? Don't forget that ...