You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: Nicholas Jones here. I would like to change the travel dates on my ticketed flights. So can you accept my request and help me in changing my flight ticket reservation?

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

USER: I am Nicholas Jones.

ASSISTANT: Sorry, there are no reservations found.

USER: Not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.