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.

USER: Thank you.

ASSISTANT: Can I have your good name please to check your reservation status?

USER: Jack Jackson here.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Jack Jackson, no reservation has found under your name to change your reservation.

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

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