You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mark King.

ASSISTANT: How can I amend you today?

USER: I want to cancel my reservation due to cancellation of my trip. Can you help me?

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

USER: Ok.

ASSISTANT: Thanks for waiting, we did not found any reservation by this name.

USER: That's fine.

ASSISTANT: Thanks for opting us, have a nice day.

USER: Thank you for the information.