You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Brown.

ASSISTANT: How may I help you out?

USER: Can you help me in changing my recent reservation as my interview got postponed?

ASSISTANT: Sure, I will help you in changing the ticket.

USER: Thank you.

ASSISTANT: Sorry, there are no reservations found.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.