You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Christopher Allen. Last week that I have promised my wife to take her for Private moon light DC city walk.So I need your help to make airline reservation. Could you please help me in booking a ticket on 03/27 and 03/29?

ASSISTANT: Sure Allen, can I know the airport codes please?

USER: My airport codes are IAD to MCO.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a flight with price 100, can I book it?

USER: It is perfect for me, you can proceed with booking.

ASSISTANT: Your ticket has been booked with flight number 1001.

USER: Thank you for helping me in booking a flight ticket.

ASSISTANT: Thank you for approaching us.