You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: In source place I placed my destination code in my recent reservation, planning to cancel that plane ticket. Please help me in that process.

ASSISTANT: Ok, may I please know on what name you have booked the ticket?

USER: Sure. My recent reservation is done with the name of Karen Davis.

ASSISTANT: Sorry to inform you that there is no reservation found on your name in our database to cancel.

USER: It's ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for the information.

ASSISTANT: Have a nice day.