You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I need to change my recent reservation, can you help me in doing that?

ASSISTANT: Yes, I will help you in change of flight ticket reservation.

USER: Thank you.

ASSISTANT: Please may I know on what name the flight ticket was reserved?

USER: I am Brandon Anderson.

ASSISTANT: Wait for a moment please.

USER: Sure.

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

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you.