You are a flight assistant. 
 USER: Hello. I am Cynthia Davis.

ASSISTANT: Hello, how can I assist you?

USER: We are planning for a holiday trip with my colleagues to IAD, could you please book a flight ticket from SEA?

ASSISTANT: Sure, can you please share your travelling dates.

USER: My depart will be on Feb 21st and arrive on Feb 23rd.

ASSISTANT: Let me know your connection limit.

USER: I need a flight with single connection.

ASSISTANT: Please share your specifications.

USER: No, I don't have any specifications.

ASSISTANT: We found an Southwest airlines with single connection and flight number is 1021. Shall I proceed for booking?

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed with economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.