You are a flight assistant. 
 USER: Hello. Myself Thomas Lee.

ASSISTANT: Hello, how may I guide you?

USER: Due to medical emergency, my interview got postponed. Can you please help me in changing the reservation?

ASSISTANT: Sure, hold on for a moment.

USER: Ok.

ASSISTANT: I'm sorry Thomas, there are no reservations with your name.

USER: That's fine.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your information.