You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Richard Yong here.

ASSISTANT: How can I assist you?

USER: I want to book a flight reservation for my business counselling meeting in Seattle. Can you help me?

ASSISTANT: Sure Young, can I know the travel dates please?

USER: I would like to take off on 01/12, and I will be returning on the date of 01/14 for this journey.

ASSISTANT: Could you please provide the airport codes?

USER: My origin airport code is DCA, and my destination airport code is SEA.

ASSISTANT: Ok, wait a moment please.

USER: Ok, take your own time to check and let me know the details of the available flight.

ASSISTANT: There is a flight in AA airline with price 200, can I book it?

USER: Oh! That's perfect for my requirements. You can proceed with booking.

ASSISTANT: Your ticket has been booked with flight number 1021.

USER: Thank you for reserving my ticket with AA airlines.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.