You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I planned to meet my friend in DFW, can you please help me to book a flight ticket from DCA?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: I prefer to travel on Jul 27 and Jul 29.

ASSISTANT: Let me know your connection limit.

USER: I prefer to travel in a connecting flight.

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

USER: No.

ASSISTANT: May I know your name for further process?

USER: I am Stephen Garcia.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.