You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Due to some health issues I am unable  to travel the trip, can you please help me in cancellation?

ASSISTANT: Sure, may I know your good name?

USER: Here Brian Martinez.

ASSISTANT: Please wait for a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, no problem.I think it is not booked properly while I was booking. Anyways,thank you for your search.

ASSISTANT: Thank you for reaching us.

USER: Welcome.