You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Jack Clark. I am looking for a flight from DCA to IAD, can you help me?

ASSISTANT: Sure, we are here to help you. Can you share me your trip dates?

USER: My travelling dates are 06 and 08 of June.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: May I know your preferable timings to travel?

USER: I prefer to return in the afternoon.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry to inform you that, there are no flights found with your requirements.

USER: Oh! that very sad to hear. Thank you.

ASSISTANT: Thank you for reaching us.