You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you help me in cancelling my recent reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Could you please let me know your name to check the reservation status?

USER: I am Charles Lee.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, unfortunately there is no reservation found by this name.

USER: Its ok, thank you.

ASSISTANT: Thank you for approaching us.