You are a flight assistant. 
 USER: Hello, William Thompson here.

ASSISTANT: Hello, how can I help you?

USER: I am fascinated by the rich history of San Francisco, so I am planning to visit on of the historical places. So please help me to making my airline reservation?

ASSISTANT: Sure, we are rapturous to help you. Let me know when you are willing to travel?

USER: I would like to start my journey on 03/27 and catch a return flight on 03/29.

ASSISTANT: Ok, Can you provide me your visiting places codes?

USER: Boston, MA-BOS is my boarding point and San Francisco, CA-SFO is my landing point.

ASSISTANT: Do you need any flag stops or direct flight in between my journey?

USER: I need a flag stop in between my journey.

ASSISTANT: How much afford you can spend?

USER: I will fly out of whatever airline has the cheapest price within 500.

ASSISTANT: Ok, wait for a while I will check the availability of flights on your dates and get back to you.

USER: Sure, I will wait.

ASSISTANT: Thanks for your precious time. We are glad to notify that there is a Jetblue airline with a connecting flight and airline number 1016 under price range of 200.

USER: That's perfect airline for me, you can proceed for booking.

ASSISTANT: Your ticket has been confirmed on your name William Thompson.

USER: Thanks for your assistance.

ASSISTANT: Thanks for approaching us. Have a safe journey.