You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jonathan Lee.

ASSISTANT: How can I help you?

USER: Due to some reasons, I would like to cancel my reservation. Can you help me?

ASSISTANT: Sure, please be on hold.

USER: Sure, take your time.

ASSISTANT: There is no reservation found under your name to do cancellation.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for choosing us.