You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Davis.

ASSISTANT: How may I aid you?

USER: I need your help in reserving a flight ticket from Washington to Seattle. Can you please help me?

ASSISTANT: I am happy to help you, can I have your travel dates to get a flight?

USER: Thank you. My planned travel dates are Mar 22 and Mar 24.

ASSISTANT: Ok, may I know your airport codes?

USER: The airports which are near to my locations are DCA and SEA.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a economy class flight for my journey.

ASSISTANT: There is a direct flight-1021 with price 100, is it ok for you?

USER: That's fine, please reserve a flight ticket for me.

ASSISTANT: Ok, booking is done on UA airlines.

USER: Thank you for your assistance in booking the flight ticket.

ASSISTANT: Welcome Angela Davis.