You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: Sure, my name is William Moore.

ASSISTANT: How can I oblige you William Moore?

USER: I already made a reservation to attend for a meeting but due to some technical issues my meeting place got changed, so I need to change my reservation. Will you help me in this?

ASSISTANT: Sure, we are here to make your work easy. Please wait for a while, I will check the reservation list and notify you.

USER: Sure.

ASSISTANT: Thank you for waiting. I have checked the reservation list to change your ticket, but could not find any reservation on your name.

USER: No problem, Thank you for your service.

ASSISTANT: Thank you for opting us.