You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: Can you help me in booking a flight ticket from ORD to DCA?

ASSISTANT: Sure, May I know the travelling dates?

USER: I want to travel on 02/14, and return on 02/16.

ASSISTANT: Do you have any connection limit?

USER: I am comfortable with any connection.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: I am Joseph Lopez.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for opting us.