You are a flight assistant. 
 USER: Hello. I am Brian Anderson.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a flight ticket on 06/22 to attend a function, will you help me out with this?

ASSISTANT: Sure, may I know your airport codes?

USER: My source point is Washington DC - DCA. My destination airport is New York, NY - LGA.

ASSISTANT: When would you like to return on?

USER: I intend to return on 06/24.

ASSISTANT: Do you want any specification?

USER: I need a connecting flight.

ASSISTANT: We found a flight on your details with airline Southwest, flight number: 1028. Shall I book ticket.

USER: OK, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you so much.