You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Please help me to book a flight ticket from BOS to IAD.

ASSISTANT: Sure, may I know your trip dates?

USER: My journey dates are from Apr, 21 to Apr, 23.

ASSISTANT: Do you have any specifications?

USER: I need a single connecting flight.

ASSISTANT: May I know your name?

USER: Barbara Carter.

ASSISTANT: There is a connecting flight with number 1018 in airline JetBlue, the fare is 100 in economy class. Can I book it?

USER: Please proceed.

ASSISTANT: Your ticket is reserved.

USER: Thank you for booking.

ASSISTANT: Thank you for opting us.