You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how best I can serve you today?

USER: Can you help me to book a connecting flight?

ASSISTANT: Sure, can you please assign your source and destination airport codes?

USER: My preferred airport codes are BOS and CLT.

ASSISTANT: May I know on which dates you wish to travel?

USER: My travelling dates are Feb 21 and 23.

ASSISTANT: May I know your name please?

USER: My name is Pamela Lewis.

ASSISTANT: Do you have any more specifications in your journey?

USER: I want to return at afternoon.

ASSISTANT: We found a United airlines, flight number 1003, price is 100 with one stopover, and your return time is 14:00 hours. Shall I proceed?

USER: Proceed with booking.

ASSISTANT: Your ticket has been reserved in economy class.

USER: Thank you.

ASSISTANT: Thank you for approaching us.