You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I abet you?

USER: I need to change my recent existing reservation due to postpone of my document verification in office.

ASSISTANT: Ok.

USER: Can you help me in that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can I have your good name to check for the previous reservation?

USER: Catherine Robinson is my name.

ASSISTANT: Please standby.

USER: OK.

ASSISTANT: Thanks for your time, we did not find a reservation on your name.

USER: That's ok, not an issue. Thanks for the information.

ASSISTANT: Thanks for opting us.