You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for the day?

USER: My interview got postponed, I want to change my existing reservation. Can you please change my reservation?

ASSISTANT: Sure, I am here to help you. Can I have your name please?

USER: Sure, I am Betty Martinez.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for your time, no reservation was found based on your name.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for visiting us.