You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be of your address?

USER: I am Thomas Nelson, I want to change my recent reservation as my interview got postponed.

ASSISTANT: Sure, please wait a moment I will check the reservation by this name.

USER: Please do this for me.

ASSISTANT: Sure. Wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there is no reservation found by this name.

USER: Its Ok, Thanks for your assistance.

ASSISTANT: Thanks for contacting us, have a nice day.