You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to visit San Francisco to meet my friend, will you help me in booking the flight ticket from BOS?

ASSISTANT: May I know your travel dates?

USER: My preferable journey dates are Dec 21 and Dec 23.

ASSISTANT: May I know your good name please?

USER: Emily Carter here.

ASSISTANT: Please give me a while.

USER: I need a flight with single connection in normal-cost airlines.

ASSISTANT: Do you have any preferences with Airline cost and class preferences? May I know your preferred timings?

USER: No, I am comfortable in any class and timings.

ASSISTANT:  Your reservation found with Jet Blue airlines in economy class and connection limit is 1. Shall I proceed for booking with flight number 1012?

USER: If it is normal-cost airlines, you can proceed with the booking.

ASSISTANT: Sorry there are no flights available with normal cost.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.