You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My vacation has been postponed.Can you please help me for cancelling the recent reservation?

ASSISTANT: Sure, May I know your name please?

USER: Sure, my name is Stephanie Carter.

ASSISTANT: There is no reservation with your details. Thank you for approaching us.

USER: Thank you for your help.