You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you please help me with my flight ticket changing process?

ASSISTANT: Sure, I will help you in changing the reservation. May I know your name please?

USER: Thank you and my name is Barbara Carter.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: Not an issue with that one, thank you for checking my reservation status.

ASSISTANT: Thank you for reaching us.

USER: Welcome.