You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am looking to modify my travel dates in the past ticket. Can you please help me to do that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for accepting my request.

ASSISTANT: May I know your name please to check your previous reservation status?

USER: My name is Kevin Turner.

ASSISTANT: Kevin Turner, no reservation has been found on your name in our database.

USER: That's fine, not a problem with that. Thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.