You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Linda Clark, can you cancel my existing reservation?

ASSISTANT: Sure, please give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry Linda, no reservation found on your name in our database.

USER: Ok, not a problem. May be the reservation is not done before.

ASSISTANT: It's my pleasure.

USER: Thank you for aiding me.

ASSISTANT: Most welcome.