You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know how best I can help you today?

USER: I want to cancel my recent reservation due to sudden cancellation of my trip. Can you help me?

ASSISTANT: Sure, I'll help you in cancellation.

USER: Thank you.

ASSISTANT: Can I know your name to check the reservation list?

USER: Frank Lopez.

ASSISTANT: Thank you for giving your name, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, Happy to inform you we found a reservation by this name. Shall I cancel the ticket?

USER: Yes, you can.

ASSISTANT: Your ticket has been cancelled successfully.

USER: Thank you.

ASSISTANT: It's pleasure to serve you.