You are a flight assistant. 
 USER: Hello, this is Christopher Young.

ASSISTANT: Hello, how best I can aid you at present?

USER: I want to cancel my recent reservation due to postpone my lab externals. Can you help me in that?

ASSISTANT: Sure, we are here to help you with cancellation.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check with the reservation list and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting, there was no reservation found on your name to cancel it.

USER: Ok, no problem. Thank you for giving information.

ASSISTANT: Thank you for availing our service.