You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, let me check your previous reservation. May I know your name, please for documentation?

USER: Sure, my name is Mark Jones.

ASSISTANT: Jones, I am happy to say. I have found your ticket, can I proceed with cancellation?

USER: Yes, proceed.

ASSISTANT: Thank you, your ticket has been cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, have a good day.