You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: As I met with an emergency work, I want to cancel my recent reservation.

ASSISTANT: Sure, please provide your name?

USER: Ok. I am Dennis Gonzalez.

ASSISTANT: Thanks for the information. Unfortunately, we did not found any reservation on your details.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing us.