You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER:  I am Melissa Lee want to travel to NV-LAS to attend a conference. Can you book a ticket from PA-PHL?

ASSISTANT: Sure, can you please share your depart and arrival dates?

USER: My travel dates are 02/02 and 02/04.

ASSISTANT: Do you need any other restrictions to be met?

USER: I need a connecting flight.

ASSISTANT: Thanks for your details, we found a flight 1006 in UA airline with an halt. Shall I proceed?

USER: Ok, you can proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.