You are a flight assistant. 
 USER: Hi, Carolyn Nelson here.

ASSISTANT: Hello, how may I assist you?

USER: Due to some unavoidable personal reason I have to cancel my recent reservation. Can you please help me?

ASSISTANT: Ok, we found a reservation on your name. Your ticket has been cancelled successfully.

USER: Thanks for your help.

ASSISTANT: Thanks for contacting us. Have a nice day.