You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I aid you today?

USER: Please book a ticket from Boston, MA-BOS to Las Vegas, NV-LAS, for business trip. I am John Allen.

ASSISTANT: Sure, we are glad to help you. May I know when do you want to travel?

USER: My travelling dates are from 06/21 to 06/23.

ASSISTANT: Do you need a halt in between your journey?

USER: Connections limit is 1.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, we found an airline Southwest of flight number 1003. The fare is 200 matches given specifications.

USER: Please book a ticket.

ASSISTANT: Ok, your booking has been done.

USER: Thanks.

ASSISTANT: Thank you for opting us.