You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, I appreciate you bringing this to our attention.

USER: Thank you.

ASSISTANT: To help you change your flight ticket reservation. Please may I know on which name the flight ticket was booked?

USER: I am Benjamin Moore.

ASSISTANT: You have to wait for a moment please because I have to check for your existing flight reservation.

USER: Thank you.

ASSISTANT: Thanks for your time. But Sorry I could not find your flight ticket reservation to change it.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thanks for the information.