You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to visit CLT. Can you please help me in booking flight ticket from BOS?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are Apr 21 to Apr 23.

ASSISTANT: Please share me your name.

USER: Barbara Carter here.

ASSISTANT: Do you have any specifications?

USER: My return should be in the morning.

ASSISTANT: We found a economy class flight American Airline, flight number: 1023.

USER: Is this a connecting flight or direct flight?

ASSISTANT: Sorry to say that some issues the flight was changed the flight details are United airline, flight number: 1004 and one connection limit. Shall I book this ticket?

USER: You can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you.