You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Andrew Johnson here. I'm planning to visit SFO, please book a ticket from BOS.

ASSISTANT: Sure, let me know your travelling dates.

USER: Sure, my planned departure and return travel dates are 28th and 30th of May.

ASSISTANT: Can you please share your connection limit?

USER: Yes, I'm looking for flights with 1 connection.

ASSISTANT: Please share your specifications.

USER: Yes, I want to depart on the evening.

ASSISTANT: We found a AA airlines with single connection and your depart time in the evening 21:00 PM. Shall I proceed for booking?

USER: That's fine, you can proceed for booking the ticket.

ASSISTANT: Your ticket has been confirmed with 1004 flight.

USER: Thank you so much for your help.

ASSISTANT: Thank you for choosing us.