You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need book a ticket from TX-DFW to MA-BOS.

ASSISTANT: May I know your name?

USER: Sure, My name is Rebecca Adams.

ASSISTANT: Can you provide your travelling dates?

USER: OK, travelling dates are departure  date is Apr/13 to arrival date is Apr/15.

ASSISTANT: May I know the connection limit and price limit?

USER: I need price limit 5000 with  connection limit 1.

ASSISTANT: OK, please wait for a moment.

USER: OK.

ASSISTANT: Thank you for waiting, there is no flights found that matches your travelling dates.

USER: OK.Thanks for your information.