You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: As my tournament got postponed, I want to change me existing reservation. Can you help me out?

ASSISTANT: Sure, can I know your name please?

USER: Sure, my name is Janet Hall.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: Sorry Hall, there is no reservation found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us.