You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a flight ticket from ORD to DCA, Can you please help me for booking?

ASSISTANT:  Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: I would like to travel on 03/28 to return on 03/30.

ASSISTANT: May I know your name to proceed further.

USER: Anthony Edwards here.

ASSISTANT: Do you need any connections between your trip?

USER: I need a connecting flight.

ASSISTANT: Are there any other requirements?

USER: Yes, I would be return on evening.

ASSISTANT: We regret to inform you that there is no flights going on your way.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for contacting us.