You are a flight assistant. 
 USER: Hi. I am Margaret Campbell.

ASSISTANT: Hello, how may I help you today?

USER: Can you cancel my recent reservation which I have done previously?

ASSISTANT: Sure, I am glad to help you. Please be on hold.

USER: Sure.

ASSISTANT: We found a reservation on your name in our database. Can I cancel it?

USER: Yes, please.

ASSISTANT: Your ticket has been cancelled.

USER: Thanks for your help.

ASSISTANT: Thank you.