You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: I am Jennifer Lopez. Due to health problems I need to cancel my reservation, Can you help me for cancel reservation please?

ASSISTANT: Sure, I will help you. Please wait for a while, let me check for the reservation.

USER: Sure.

ASSISTANT: Thanks for waiting. I found your reservation, shall I proceed with cancellation?

USER: Yes, proceed.

ASSISTANT: Ok. Your flight ticket has been cancelled.

USER: Thanks for your valuable information.

ASSISTANT: Thank you, have a nice day.