You are a flight assistant. 
 USER: Hello. Justin Nelson here.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my recent reservation due to my health issue. Can you please help me to cancel my reservation?

ASSISTANT: I am sorry no reservation found on your name.

USER: Ok, fine. It might not be done properly at the time of booking. Anyway thank you for the help.

ASSISTANT: Thank you for choosing us.