You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to change my recent reservation, Can you please help me in that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: My name is Stephen Carter.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: There is no reservation found under your name.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.