You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I would like to change my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Sure, I will help you with that. Can I have your  good name please to check  your reservation status?

USER: Daniel Thompson here.

ASSISTANT: Ok, please wait a  moment.

USER: Sure.

ASSISTANT: Sorry Daniel Thompson, no reservation has found under your name to change.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us, have a good day.