You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation, because I am unable to catch that flight due to some health problems, can you please cancel my reservation?

ASSISTANT: Sure, can I know your name please?

USER: Thanks, my name is Sharon Hall.

ASSISTANT: Sorry Hall, there is no reservation found on your name in our records.

USER: It's ok no problem, may be I am not booked my ticket properly at that time.

ASSISTANT: Thank you for choosing our service.

USER: Thank you for your information.