You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I want to attend a Seminar in Orlando. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, on what dates are you planning to travel?

USER: My travelling dates are Jan 13 and Jan 15.

ASSISTANT: From which airport would you like to leave?

USER: My source airport code is BOS.

ASSISTANT: How many connections do you need?

USER: I prefer single connecting flight.

ASSISTANT: Any other requirements to be met?

USER: I want to return in evening.

ASSISTANT: Please forward your name.

USER: My name is Eric Johnson.

ASSISTANT: Ok, please wait.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.