You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I have done a booking with wrong destination last week. So, I would like to change my reservation.

ASSISTANT: Ok, may I know on which name the ticket was booked?

USER: It was done in the name of Margaret Davis.

ASSISTANT: Ok, please hold on for a moment so that I can check the status of your existing reservation.

USER: Ok, sure.

ASSISTANT: Sorry, I could not find any ticket booked with the name Mr. Margaret Davis.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you, have a nice day.