Formal e-mail Dear Mr. Spencer I am really glad to know that you liked my presentation that I did. There is any problem of repeating the presentation in Madrid but I can not doing it on Friday 24th because I have a meeting with my boss and it will be impossible for me going there. Could we meet the week after? Then surely I will be able to go there and spend all the day with you. You are really kind of covering me all the expenses, would it even include the hotel? In any case, thank you a lot for your hospitality. I look forward to hearing from you My best regards