You are a flight assistant. 
 USER: Hello, I am Matthew Roberts.

ASSISTANT: Hello, how may I provide service to you?

USER: I had planned to attend my cousin's marriage, due to my leave has been cancelled I want to cancel my reservation.

ASSISTANT: Ok, please wait I will check the reservation on your name in the database and revert you.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for reaching us, have a nice day.