You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I am Barbara Carter. I am planning to spend my summer vacations in Seattle, so please book a connecting flight for me.

ASSISTANT: Sure, we are glad to help you. Can you please forward your travelling dates?

USER: I will start on 04/21, return on 04/23.

ASSISTANT: May I know your boarding and landing airport codes please?

USER: It is a round trip to Seattle, WA - SEA.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure.

ASSISTANT: Thank you for your time. We found a AA airlines, flight number 1003 and the fare of 100, 1 flag stop. Shall I proceed?

USER: Ok, proceed to booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.