You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please check with my previous booking and help me with changing my airport codes please?

ASSISTANT: Sure, may I know your good name?

USER: I am Jack King.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Oh! That's sad to know. Thank you for checking anyways.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.