Read the extracts from some formal letters below. Which are beginnings

Read the extracts from some formal letters below. Which are beginnings and which are endings? Find the pairs. Which letter from Ex. 1 does each pair belong to?
1 Once again, I would like to thank you for agreeing to take part. Please do not hesitate to contact me if you have any questions or concerns.
2 I am writing to inquire about the Open Day you are holding at the university on Friday 6th May.
3 Thank you very much for agreeing to be one of the guest speakers at our school careers fair. Please allow me to give you some details about the day.
4 Thank you in advance for your help. I have enclosed a stamped, addressed envelope in which to return my driving licence if you find it.
5 Thank you very much for making my stay at your Bed and Breakfast which was so enjoyable. Unfortunately, when I arrived home I realised/ that I had left my driving licence behind.
6 Lastly, could you please send me directions to the university campus from the train station? Thank you in advance.
7 All in all, I am extremely disappointed and feel that I am entitled to at least a partial refund of the course fees that I paid. I look forward to your prompt reply.
8 I am writing to express my dissatisfaction with the web design course that I have just completed at your cullege.