You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how shall I help you?

USER: Actually my Snooker's competition is postponed, so that I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, I am glad to assist you in that flight ticket modification.

USER: Thank you.

ASSISTANT: On whose name the ticket booking is done previously?

USER: Sure, I am Sharon Scott here.

ASSISTANT: I am unable to help you in that flight ticket modification that there is no flight ticket booking under your name when I have checked in our back end.

USER: Ok, not a problem. Anyway's thank you for your information.

ASSISTANT: It's my pleasure to serve you and have a nice day.