You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, we are you to help you. May I know your name?

USER: My name is Carolyn Garcia.

ASSISTANT: Please wait a moment, I will check the reservation list and revert you.

USER: Sure, I will wait.

ASSISTANT: Thanks for your time. Sorry there is no existing reservation found on your name.

USER: That's not a problem.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your information.