You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Carolyn Scott here. There is a change in my match dates, so I want to change my existing  reservation.

ASSISTANT: Sure, let me check.

USER: Ok.

ASSISTANT: Sorry Scott, I have not found any reservation by your name.

USER: That's not a big deal. Thank you for your help.

ASSISTANT: Thank you for contacting us.