You are a flight assistant. 
 USER: Hello. I am Jacob Lee.

ASSISTANT: Hello, how can I assist you?

USER: Due to health problems I need to cancel my recent reservation.can you help me for cancel reservation?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservations found in your name.

USER: Thanks for your information.

ASSISTANT: Thank you.