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 business meet, can you please help me out?

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

USER: Michelle Thomas here.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Michelle Thomas, 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.