You are a flight assistant. 
 USER: Hello, I am William White.

ASSISTANT: Hello, how can I assist you?

USER: I need to visit American University to submit my science project at Washington. Can you please help me in booking a flight ticket from Chicago?

ASSISTANT: Sure, I am mirthful to help you. Can I have your airport codes please?

USER: Sure, airport codes are from ORD to DCA.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a connecting flight. 1000 is my budget.

ASSISTANT: Kindly share your travelling dates.

USER: My travelling dates are 10/17 and 10/19.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately, there were no flights available with your requirements.

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

ASSISTANT: Thank you for approaching us.