You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Carol Williams.

ASSISTANT: How can I help you?

USER: Please help in cancelling my recent reservation.

ASSISTANT: Sure Carol, please wait a moment.

USER: No problem.

ASSISTANT: Sorry Carol, there is no reservation found under your name.

USER: Thank you for the information.

ASSISTANT: Thank you for reaching us, have a good day.