You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to my health problem, I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, to cancel may I know your name?

USER: My name is Jessica Roberts.

ASSISTANT: Sorry there is no reservation found on your name.

USER: Thanks for your kind information.

ASSISTANT: Thank you for reaching us, take care.

USER: Thank you.