You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know your name?

USER: David Rodriguez here.

ASSISTANT: Ok,  please wait  a minute.

USER: Ok.

ASSISTANT: We found a reservation on your name, shall I cancel it?

USER: Yes, You can.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you.

ASSISTANT: Thank you.