You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my travel dates in my reservation so can you please help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for your response.

ASSISTANT: May I know your good name for further checking?

USER: Sure, my name is Timothy Lee.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that, there is no flight found as per your name in our database.

USER: Oh! It's ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.