You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Smith.

ASSISTANT: Kevin Smith, how may I assist you with today?

USER: Can you please help me in changing my reservation as my meeting got postponed?

ASSISTANT: Yes, I will try to help you. Please allow me a minute while I check for your details.

USER: Ok.

ASSISTANT: I am sorry to inform you that there is no booking done on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for understanding.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Have a great time.