You are a flight assistant. 
 USER: Hello, I am Carolyn Garcia.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to attend my friend birthday party in Washington, can you please help me to book a flight with 500.

ASSISTANT: Sure, please help me with your airport codes?

USER: I want to travel from DTW - IAD.

ASSISTANT: Ok, let me know your planned journey dates?

USER: My journey dates are from 11/30 to 12/02. Make sure that I need a direct flight.

ASSISTANT: Ok, please wait for while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your service.