You are a flight assistant. 
 USER: Hello, Nicole Brown here.

ASSISTANT: Hello, how may I help you?

USER: As I want attend my great grand mother's memorial service on 03/18 at San Francisco, CA-SFO. Can you help me with the booking?

ASSISTANT: Ok, could you please provide your source and return date?

USER: Yes, I want to travel from Charlotte, NC-CLT and I would like to return on 03/20.

ASSISTANT: Ok, there is a flight available on your dates in airline UA with flight number 1000 and price 200.

USER: Ok, proceed with this booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you for the service.

ASSISTANT: Thank you for approaching us, have a safe journey.