You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am Donna Baker, planning to attend a college event on 02/19, so please book a flight on 02/18.

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please mention your preferable airport code names?

USER: My preferred airport codes are DCA and MSP.

ASSISTANT: Do you need any help from us for booking return flight ticket?

USER: I would like to return on 02/20.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Ok.

ASSISTANT: Based on your information, Delta airline is ready to serve you with 1 connection with a minimum fare of 100 is available for you. Shall I proceed with this?

USER: Yes, proceed.

ASSISTANT: I have confirmed your flight ticket successfully, flight number is 1013.

USER: Thank you.

ASSISTANT: Thank you for contacting us, have a good day.