You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please let me know what help you are looking  for?

USER: I want to cancel my recent reservation because of some health issues, can you please help me out?

ASSISTANT: Of course, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please provide the name which is on your previous ticket?

USER: Sure, my previous reservation is on the name of Kathleen Collins.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, I am unable to find your past ticket in our database.

USER: No problem, thank you for your information.

ASSISTANT: You are welcome. Thank you for choosing us.