You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I be of your assistance?

USER: I am Gary Wright, help me to cancel my ticket as my plan to see my grand children as been cancelled.

ASSISTANT: Sure, one moment I will let you know the information of flight.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flight that matches your requirements.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for choosing us.