You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am John Smith. I want to cancel my reservation, due to my personal problems.

ASSISTANT: Sure, please wait a while I will check the reservation list.

USER: Ok.

ASSISTANT: Thanks for your time, we found a reservation on your name. Shall I proceed to cancel it?

USER: You can proceed to cancellation.

ASSISTANT: Ok, your reservation has been cancelled successfully.

USER: Thank you.

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