You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I help you?

USER: I am Deborah Miller. I want to book a flight ticket with my price limit of 200. please help me in booking a flight ticket.

ASSISTANT: Please specify your travelling codes?

USER: I am planning to attend my nephew birthday in PA - PHL and my origin from CA - OAK. I need a single connection in between my journey.

ASSISTANT: May I know your travelling dates?

USER: My departure is 07/15 and my return date on 07/17.

ASSISTANT: Flight ticket can be booked with airline UA, price 100. Flight number 1010 with connections 1.

USER: You can proceed to booking.

ASSISTANT: Ticket is booked.

USER: Thanks for your service.

ASSISTANT: Thanks.