You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brian Baker.

ASSISTANT: How may I help you out?

USER: I want visit The Lincoln Memorial which is an American national monument in Washington, can you please help me to book a flight ticket?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are Aug 26 and Aug 28.

ASSISTANT: Can I know your airport codes too?

USER: I will travel from PHL to IAD.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed?

USER: Please proceed with the booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1003.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.