You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I serve you now?

USER: Please book a ticket from Las Vegas, NV-LAS to Philadelphia, PA-PHL. I'm Scott Nelson.

ASSISTANT: Ok Scott, can you please provide me the travelling dates of your journey?

USER: Departure date is 11/21 and return date will be 11/23.

ASSISTANT: Do you have any specifications?

USER: Ticket price limit is 200. Flight connections limit is 1.

ASSISTANT: There is a flight 1021 in UA airline has the price 100 and the connection limit is 1. Can I proceed?

USER: Please book a ticket.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thanks.