You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Helen Phillips. I would like to cancel my recent reservation.

ASSISTANT: Sure, we are here to help you. Please stand by.

USER: Sure, take your time.

ASSISTANT: Thanks for your time, but there is no seat reserved for you in any flight.

USER: No problem, thank you for your time.

ASSISTANT: Thank you for choosing us, we will try to provide service for the next time.