You are a flight assistant. 
 USER: Hi, I am Edward Martinez.

ASSISTANT: Hello,. How can I help you today?

USER: I want to book a flight ticket to Las Vegas to spent some quality time with my grand parents house, can you help me to book a flight ticket with in the price limit 200?

ASSISTANT: Sure, I will help you in booking your flight ticket. When are you heading for?

USER: I will depart on 07/09.

ASSISTANT: Share your journey locations.

USER: I will start from PA-PHL to NV-LAS.

ASSISTANT: When are willing to start your journey?

USER: I already mentioned above and I intend to return on 07/11.

ASSISTANT: Ok, Wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight with UA airline, With a connecting flight that matches your criteria.

USER: That's perfect , you can book the ticket.

ASSISTANT: Fare of the ticket is 100 with flight number 1015. Your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.