You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to cancel my recent ticket due to some health issues, I am unable to travel. Can you please help me?

ASSISTANT: Sure, may I know your name to check the reservation list?

USER: Thank you. My name is Amy Smith.

ASSISTANT: Sorry there is no reservation on your name.

USER: That's not a problem, thank you for your time.

ASSISTANT: Thank you so much for choosing us.

USER: You are welcome.