You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Thomas Hall. I want to change my existing reservation due to bad weather condition, can you please help in that?

ASSISTANT: Sure, we are here to aid you. Please wait for a while, I will check the status and revert to you.

USER: Sure.

ASSISTANT: Thank you for your time, No reservation was found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.