You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: My exam date got postponed to some other date, can you please help me in changing my existing reservation?

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: Sure, I am Larry Lee.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thanks for approaching us.