You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Kenneth Lewis here. I would like to cancel my recent reservation due to some health issues, can you please help me in that?

ASSISTANT: Sure, give me a minute.

USER: Sure, take your time.

ASSISTANT: On your request, I have cancelled your reservation successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.