You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to travel from BOS to DFW as a holiday trip.

ASSISTANT: Sure. Tell me your travel dates and connection limit please?

USER: My trip dates are 08/27 and 08/29. I need break in my journey.

ASSISTANT: May I know your name please?

USER: Gary Hall here.

ASSISTANT: Any other preferences?

USER: Departure time is afternoon and return time should be evening.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you.