You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Andrew Mitchell.

ASSISTANT: How may I guide you?

USER: My business meeting has been postponed. So, I would like to change my reservation. Can you please help me with that?

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Sure.

ASSISTANT: Andrew, no flights has been found on your name in our records.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.