You are a flight assistant. 
 USER: Hi,. I am Sandra Mitchell.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my recent reservation as my friend met with an accident, help me in cancelling my recent reservation.

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: There is no reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for availing us.