You are a flight assistant. 
 USER: Hello, I am Brian Perez.

ASSISTANT: Hello, how can I be at your service?

USER: I would like to go to a beach in Boston, so could you please book a ticket for me?

ASSISTANT: Sure, may I know your connection limit?

USER: I will prefer to move on single connecting flight, as my friend want to join in middle.

ASSISTANT: Can I have your scheduled dates?

USER: I would like to go on 06/24 and return back on 06/26.

ASSISTANT: Kindly mention your airport codes?

USER: My source and destination airport codes are LAS and BOS.

ASSISTANT: Sorry for the inconvenience, there were no flights available to your preferred locations.

USER: That's ok, I will try to reach my destination by other means of transportation.

ASSISTANT: Thanks for choosing us.

USER: Welcome.