You are a flight assistant. 
 USER: Hi,. I am Jason Parker.

ASSISTANT: Hello, how may I assist you today?

USER: Due to my illness I would like to cancel my recent reservation. Can you help me out in cancellation?

ASSISTANT: Sure, please wait a couple of minutes.

USER: Sure.

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

USER: Ok. Thank you for best service.

ASSISTANT: Thanks for opting us, have a great day ahead.