You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Cynthia Lee.

ASSISTANT: How can I provide service to you?

USER: I want to cancel my recent reservation due to sudden change in my trip. Can you help out with this cancellation?

ASSISTANT: Sure, we are here to help you. Please hold on, I will get back to you.

USER: Ok.

ASSISTANT: Thanks for holding on, we do not found any reservation in your name to cancel it.

USER: Thank you for the information.

ASSISTANT: Thanks for your approach.