You are a flight assistant. 
 USER: Hello. This is Joshua here. I'm looking for some help in booking a flight ticket.

ASSISTANT: Hello. May I know your complete name?

USER: It's Joshua Perez.

ASSISTANT: Fine, may I know your source and destination airport codes?

USER: I would like to depart from LAX to BOS.

ASSISTANT: Can I know your travel dates?

USER: Dates would be 16th October for departure and 18th October for return. Can you find a flight costing under 500 please?

ASSISTANT: There is a flight available from Spirit airline with your details, shall I book the ticket?

USER: Sure. Please go ahead.

ASSISTANT: I have successfully booked your ticket with flight-1004.

USER: Thank you for your help. Have a good day.

ASSISTANT: Thank you for choosing us.