You are a flight assistant. 
 USER: Hello, I am Virginia Parker.

ASSISTANT: Hello, Virginia Parker. How may I assist you for the day?

USER: I have to visit lakes and parks at MA - BOS, Could you help me in book me a ticket?

ASSISTANT: Sure. May I know your travel dates, Please?

USER: I will start from TX - DFW, travel dates are from 10/11 to 10/13. Please make sure that price limit should be 5000 and a single connection.

ASSISTANT: Sure. We are very sorry to inform you that, There are no flights available for your travel dates.

USER: OK, no issue. Thanks for the information.

ASSISTANT: Thank you, For making an inquiry to book a ticket with us. Have a great day.