You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Kimberly Brown. Actually, I want to cancel my recent reservation, due to some health issue. Can you help me out?

ASSISTANT: Yes, I will help you with that. Please give me a moment.

USER: Sure.

ASSISTANT: Sorry. There is no reservation on your name.

USER: Thank you for taking time to speak with me.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Welcome.