You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you please assist me to change the travel dates in the past ticket?

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

USER: Thank you for accepting my request. I am Pamela Martinez.

ASSISTANT: Sorry, there are no reservations found.

USER: It's ok, not a problem with that. Anyways thank you for checking my ticket status.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.