You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Myself Scott Edwards. I would like to change my recent reservation because my sister engagement was postponed.

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, sorry, no reservation found with provided name.

USER: That's ok, no problem. Thank you for checking.

ASSISTANT: Thank you for availing us.