You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you the best today?

USER: I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, may I know your name please?

USER: My name is Stephanie Walker.

ASSISTANT: Just give me a moment.

USER: Ok.

ASSISTANT: I found a reservation on your given name and it has been cancelled successfully.

USER: Ok, thank you for the help.

ASSISTANT: Thank you for choosing us.