You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Larry Williams.

ASSISTANT: How can I assist you today?

USER: I am planning to attend a meeting at LAS. Can you please help me out to book a ticket from PHL?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I would like to travel on 01/23 and return back on 01/25.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is a flight with price 200 and the connections 1 is available.

USER: Please proceed the booking.

ASSISTANT: Your ticket is booked. The flight number is 1002 and the airline is Delta.

USER: Thank you for your help.

ASSISTANT: Welcome, have a great day.