You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I assist you?

USER: I need to book a flight ticket with price under 5000, can you book me a flight ticket?

ASSISTANT: Please provide your travelling codes?

USER: I would like to travel from PHX to LAX.

ASSISTANT: Please specify your travel dates?

USER: I want to travel from 01/19 and return on 01/21.

ASSISTANT: May I know your name?

USER: Yes, you can call me as Joseph Brown.

ASSISTANT: Flight ticket is available with airline Frontier, connections 1.

USER: Please proceed with this booking.

ASSISTANT: Price 100, flight number is 1003. Ticket is booked.

USER: Thank you.

ASSISTANT: Thanks.