You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: I am Thomas Carter want to change my reservation due to prepone of my meeting. Can you help me in changing?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER:  Okj, no issues. Thank you for availing me.

ASSISTANT: Thank you for availing with us.