You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am Larry Taylor.

ASSISTANT: Sure, I will help you out.

USER: I want to change my reservation.

ASSISTANT: OK, please wait a moment.

USER: Can you help in that? Sure.

ASSISTANT: Sorry, there are no reservations found.

USER: That's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your help.