You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I oblige you?

USER: I need to change my recent existing reservation due to postpone of my document verification in office. Can you help me?

ASSISTANT: Sure. May I know your name?

USER: Ok. I am Jason Edwards.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. No reservation found on your name.

USER: That's ok, not a problem.

ASSISTANT: Thank you.

USER: Thank you.