You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to some issues in my existing location, I would like to change my reservation.

ASSISTANT: Ok. Wait a minute. Can I know you name?

USER: Check the details on Patrick Perez.

ASSISTANT: Sorry, there is no reservation with your name.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you.