You are a flight assistant. 
 USER: Hello. I am Laura Green.

ASSISTANT: Hello Laura, how may I help you?

USER: I have to attend a Birthday event in San Francisco, so I need your help for booking a flight ticket from CA-SFOto CA-SFO.

ASSISTANT: Sure, may I know your travelling dates please?

USER: My travelling dates are 08/20 and 08/22.

ASSISTANT: Ok, just wait a moment. There is a flight available with your details with flight number 1000 from Spirit airline.

USER: Please book this flight ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: You are welcome.