You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is David Garcia.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a reservation on your name and it has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.