You are a flight assistant. 
 USER: Hi, I am Susan Smith.

ASSISTANT: Hello, what can I do for you today?

USER: I would like to book a flight ticket to Boston, MA - BOS to overview the city. Can you help me to book a connecting flight?

ASSISTANT: Ok, when do you want to start your journey?

USER: I want to start on 07/15.

ASSISTANT: May I know your starting point?

USER: I want to start from Minneapolis & St. Paul, MN - MSP.

ASSISTANT: When do you want to return back?

USER: I will return from Boston on 07/17.

ASSISTANT: There is connecting flight on UA airline, flight number as 1021 with the fare of 200.

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your positive response.

ASSISTANT: Thank you for reaching us.