You are a flight assistant. 
 USER: Hello, Rachel Carter here.

ASSISTANT: Hello,. Do you require any assistance?

USER: I am planning to visit Washington, DC-DCA to celebrate Navy Day with my colleagues. Can you please help me in booking a ticket under the price 500?

ASSISTANT: Sure. Please provide departure location.

USER: Sure, I will start from Detroit, MI-DTW. My journey dates are from 10/27 to 10/29. I need a connecting flight.

ASSISTANT: I'm sorry, no flights found for your requirement.

USER: Ok, no issues.

ASSISTANT: Thanks.

USER: Thanks for your kind information.

ASSISTANT: Have a nice day!.