You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what services are you seeking from us?

USER: Help me in booking a flight from LGA to DFW?

ASSISTANT: Sure, could you please ensure your preferable dates?

USER: My travelling dates are Dec 22 to 24.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: I am Brandon Mitchell.

ASSISTANT: Please share your connection limit.

USER: I prefer travelling in connection flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.