You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am planning to travel from IAD to PHX, can you please help me in flight booking?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My departure day is June 18, return day is June 20.

ASSISTANT: Ok, do you have any specifications?

USER: I want economy class flight ticket.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure, I want a flight with one connection.

ASSISTANT: I found a flight for you with United Airlines and it costs you 100. Shall I proceed to reserve a seat in this single connecting flight?

USER: Ok, proceed to booking.

ASSISTANT: May I know whose name you would like to book this ticket?

USER: Michael Adams.

ASSISTANT: Your ticket has been booked with 1012 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.