You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Roberts Lee, help me to cancel my reservation as my plan to meet my friend is cancelled. Can you cancel my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, There was no reservation found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.