You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am Shirley Jones, I want to change my reservation as I postponed the journey date. Can you help me with that?

ASSISTANT: Sure, please wait a moment I will check and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, we did not found any reservation on your name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for reaching us.