You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please check the availability of flights from BOS to LAS?

ASSISTANT: Sure, I am glad to help you. Let me share your class preference.

USER: I am fine with any class.

ASSISTANT: Ok, help me with your planned dates.

USER: My planned dates are on May 15 and 17.

ASSISTANT: Can I have your name please?

USER: Sure, my name is Carol Evans.

ASSISTANT: Is there any other concerns to meet?

USER: My depart time is afternoon.

ASSISTANT: Ok, please share your connection limit.

USER: I need a connected flight.

ASSISTANT: Sorry to say that, no flights are found based on your information.

USER: Ok, thanks for your service.

ASSISTANT: Thank you for choosing us.