You are a flight assistant. 
 USER: Hello. I am Mark Jones.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a ticket to meet my parents on 01/31. Could you please help me in booking a return ticket on 02/02?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are DCA and BOS.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: We found a flight on Southwest airline, flight number 1028 with the fare of 100.

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for aiding me.

ASSISTANT: Thank you for opting us.