You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this flight ticket booking agency?

ASSISTANT: Yes, welcome to ABC Airline agency. How can I assist you today?

USER: My family trip was postponed due to some problems in adjusting travel dates, so I want to cancel my previous reservation can you help me?

ASSISTANT: Sure, May I know your name for checking your reservation?

USER: Sure, my name is Nicole Walker.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Your reservation is cancelled.

USER: Thank you for your help.

ASSISTANT: Welcome, have a great day.