You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Jeffrey Miller, want to travel from LGA to DCA. Can you please help me?

ASSISTANT: I am happy to help you, may I know your travelling dates?

USER: My trip dates are from 04/05 to 04/07.

ASSISTANT: May I know your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I want to travel in afternoon.

ASSISTANT: Is it a departure time or return time?

USER: Departure time.

ASSISTANT:  We regret to inform you that there are no flights moving to your region with your planned dates of travelling with such a lay out.

USER: It's ok, thank you.

ASSISTANT: Welcome, have a good day.