You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Will you please assist me to change my existing reservation as my plan to meet my friend got postponed?

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

USER: I am Patrick Parker.

ASSISTANT: Ok, wait for some time.

USER: Sure.

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

USER: Not a big issue, anyhow thank you very much for checking the reservation status.

ASSISTANT: Thanks for approaching us.