You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, can I know your name?

USER: I am Donald Scott.

ASSISTANT: Donald, how can I serve you today?

USER: I need a ticket to Austin, TX-AUS from Philadelphia, PA-PHL.

ASSISTANT: Ok. Do you need a halt within your journey?

USER: Connections limit is 1.

ASSISTANT: Ok, please specify your budget.

USER: Ticket price limit is 500.

ASSISTANT: On which dates are you want me to book your ticket?

USER: My departure will be 10/19 and intended return date is 10/21.

ASSISTANT: Ok, please hold on.

USER: Sure.

ASSISTANT: Donald, UA airline is available on your dates with fare 100 and flight number is 1000. Can I proceed?

USER: Please book a flight.

ASSISTANT: Your ticket has been successfully booked.

USER: Thanks.

ASSISTANT: Thank you for choosing our service.