You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sharon Roberts here.

ASSISTANT: How can I assist you today?

USER: We had a foot ball match today and in that match I got a sever injury, so I want to cancel my reservation.

ASSISTANT: Sure, please give me a moment. Unfortunately there is a no reservation found under your name.

USER: That's ok. Thank you for your help.

ASSISTANT: Welcome, have a great day.