You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Andrew Harris. Please book a flight ticket from CLT to IAD.

ASSISTANT: Sure, can you please share your planned trip dates?

USER: My planned travel dates are Mar, 14 and Mar, 16.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Please share your specifications.

USER: My depart time should be at afternoon.

ASSISTANT: We found an UA airlines with single connection and depart time in the afternoon. Shall I proceed?

USER: Please go ahead.

ASSISTANT: Your ticket has been confirmed with flight number 1012.

USER: Thank you.

ASSISTANT: Thank you for choosing us.