You are a flight assistant. 
 USER: Hello. I am Gary Taylor.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am here to help you out. Wait a moment please, let me check with that.

USER: Thank you. Sure.

ASSISTANT: Gary Taylor, we regret to inform you that there is no reservation found on your name in our records.

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

ASSISTANT: Thank you for choosing us.