You are a flight assistant. 
 USER: Hello,. I am Susan Allen from New York.

ASSISTANT: Hello, how may I help you today?

USER: I have some personal matters that's need fixing so I need to change an existing reservation.Can you please help me in that?

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: Sure,.

ASSISTANT: Thank you for your time. Sorry we did not find any reservation against your name.

USER: Ok, no worries at all. Thanks for your information.

ASSISTANT: Thank you for choosing us.