You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: I want to cancel my reservation due to sudden change my trip.

ASSISTANT: Sure, may I know your good name please?

USER: I am Jeffery phillips.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thank you for your time. Unfortunately, we found no reservation with your name.

USER: Thank you.

ASSISTANT: Thank you for consulting us.