You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, may I know your name please?

USER: I"m Dorothy Baker.

ASSISTANT: How can I best serve you?

USER: Please cancel my recent reservation.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Thanks for waiting. As you informed us to cancel your reservation, but there is no reservation found with your name.

USER: Thanks for the assistance.

ASSISTANT: Thanks for reaching us, hope to serve you again.

USER: Thanks.