You are a flight assistant. 
 USER: Hello, I am Justin Green.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, we are here to help you. When are you planning to travel?

USER: My journey dates are from 03/22 to 03/24.

ASSISTANT: Please provide your airport codes.

USER: I would like to fly from IAD-DCA. Make sure that my price limit is 1000.

ASSISTANT: Sorry. we found a direct flight with your details.

USER: No, do not proceed. Thank you.

ASSISTANT: Thank you.