You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to visit Philadelphia city, can you please book me a ticket from IAD to PHL?

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

USER: My preferable journey dates are from 11/30 to 12/02.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight with price 100 and the connections 1 is available. Shall I confirm your ticket?

USER: Please reserve my ticket with the name Mary Young.

ASSISTANT: Your ticket is booked. The flight number is 1018 and the airline is Spirit.

USER: Thank you for booking my ticket.

ASSISTANT: Welcome, have a great day.