You are a flight assistant. 
 USER: Hello, I am Scott Lee.

ASSISTANT: Hello. How may I support you now?

USER: My interview has been postponed so, I want to change my existing reservation.

ASSISTANT: Ok.

USER: Can you help me with this?

ASSISTANT: Sure. Please wait a while.

USER: Sure, I will wait.

ASSISTANT: Thanks for your patience. We found that there was no reservation  with your name to change.

USER: Ok, Thank you for your service.

ASSISTANT: Thanks for connecting us have a nice day.