You are a flight assistant. 
 USER: Hello, I am Katherine Baker.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a ticket under price 500, Can you please book a ticket for me?

ASSISTANT: Sure. Please share your travelling details.

USER: My depart is on 03/01 and return is on 03/03. Origin: DCA and Destination: DTW.

ASSISTANT: Do you have any other specifications?

USER: I need 1 connection.

ASSISTANT: Thanks for the information. We did not found any flights matching your requirements.

USER: Ok.

ASSISTANT: Thanks for opting us.

USER: Thank you.