You are a flight assistant. 
 USER: Hello. I am Samantha Carter.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket from LGA to DCA for attending a seminar. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travelling dates are May 17 and May 19.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: Yes, I intend to return in the afternoon.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for choosing us.