You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please cancel the ticket with the name of Debra Edwards, as my friend met with an accident.

ASSISTANT: Sure, please give me a moment, let me check and revert to you.

USER: Ok.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately no reservation found with provided name.

USER: Thank you for your information.

ASSISTANT: Thanks for reaching us, have a good day.