You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to British airways. Is there any help required from my side?

USER: Actually my Snooker's level-5 competition is postponed so that I want to change an existing reservation, could you help me?

ASSISTANT: You are in correct place, we are happy to help you. For searching in our data base, let me know your name please?

USER: Sure, my previous ticket was booked on the name of Carol Hall.

ASSISTANT: Thank you for your valuable information Hall. I would like to say that there is no ticket that had found under your name to change it, I think you reservation is not confirmed in previous stage. Is there any other help that you need from my side Hall?

USER: No, thank you for searching.

ASSISTANT: Our pleasure to help you Hall and keep contacting us in future is there any help needed.

USER: Sure, thank you.

ASSISTANT: Welcome.