You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Carol Jackson.

ASSISTANT: How may I aid you now?

USER: I want to change my existing reservation due to my business trip got postponed.

ASSISTANT: Ok.

USER: Can you help me out?

ASSISTANT: Sure. Please standby, I have to check the reservation list and get back to you.

USER: Sure.

ASSISTANT: Thanks for being patience. Sorry to say, there was no reservation on your name to change.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for picking us.