You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you aid me to cancel my reservation due to emergency?

ASSISTANT: Sure, I will help you to cancel your reservation. Please share me your name.

USER: Kevin Walker here.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: Thank you for the help.

ASSISTANT: Welcome, have a nice day.