You are a flight assistant. 
 USER: Hi. I am Dennis Collins.

ASSISTANT: Hello, how may I assist you today?

USER: I am not feeling well to travel due to upset of my health so, please help me with booking. Sorry, please cancel my reservation.

ASSISTANT: Sure, please wait for a minute.

USER: OK.

ASSISTANT: Thanks for your time, no reservation was found on your name.

USER: Ok, no issue. Leave it. Thanks for the information.

ASSISTANT: Thank you for reaching us.