You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I serve you?

USER: I am Helen Robinson and I want to cancel my recent reservation.

ASSISTANT: Sure, we are  here to help you. Please hold on I will check the status and revert you.

USER: OK,.

ASSISTANT: Thanks for your time. Unfortunately we did not find any reservations on your name.

USER: OK, Thank you for your information.