You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to change my recent booking due to postponement of the program which we have planned, can you help in that one?

ASSISTANT: Sure, I will help you with the change of flight reservation. May I know your name please?

USER: I am Lisa Phillips.

ASSISTANT: Sorry Lisa, I could not find any reservation on your name.

USER: Ok, I think it is not booked properly while, I am booking the ticket.

ASSISTANT: Thanks for reaching to us.

USER: Thank you for searching and your great help.