You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: My name is Betty Roberts, I want to change my recent reservation. Can you help me out with it?

ASSISTANT: Sure, Betty Roberts, we are here to help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, we did not find any reservation on your name.

USER: OK. Thanks for the response.

ASSISTANT: Thanks for choosing us. Have a nice day.