You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Steven Martinez.

ASSISTANT: Steven, how may I help you?

USER: I want to attend an event in Washington. Can you book a ticket from PHL to DCA?

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

USER: I want to travel in the flight on 02/05 and 02/07.

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

USER: Ok, take your own time.

ASSISTANT: I found a flight for you with UA airline and it costs you 100. Shall I proceed to reserve a seat in this flight?

USER: Proceed to booking.

ASSISTANT: Your ticket has been booked with 1018 flight number.

USER: Thank you for helping me out.

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