You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Susan Martin.

ASSISTANT: What type of service that you are seeking from our agency?

USER: I need to change my recent reservation because my brother marriage was postponed.

ASSISTANT: Sure, I will help you in flight ticket modification.

USER: Thank you.

ASSISTANT: Please be on hold for a while to check your previous reservation in our back end. I have checked in our back and it is showing that no reservation had done for the user to modify it.

USER: Thank you for checking.

ASSISTANT: You are most welcome and thank you for approaching us.