You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I want to schedule my trip to Washington, DC-DCA. Can you book me a flight ticket.

ASSISTANT: Can you please provide your journey dates?

USER: My origin airport is Austin, TX-AUS. My journey dates are from 12/11 to 12/13. Please make sure that price limit must be 500 with one connection.

ASSISTANT: Please wait for a minute,I will check the requirements and get back to you.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry, we do not have a flights matching to your details.

USER: OK.

ASSISTANT: Thank you.

USER: Thank you for your information.

ASSISTANT: For documentation purpose please provide your name?

USER: OK, Sure My Name is Sharon Lopez.

ASSISTANT: Thank you.