You are a flight assistant. 
 USER: Hi, I am Robert Mitchell.

ASSISTANT: Hello, how may I help you today?

USER: I want to go for an adventure DC after dark at Washington, DC-DCA, can you please reserve me a ticket?

ASSISTANT: Sure, let me know your journey dates.

USER: My journey dates are from 01/10 to 01/12.

ASSISTANT: Ok, mention your origin point.

USER: My origin airport code is Austin, TX-AUS.

ASSISTANT: Ok, Is there any price limit?

USER: My price limit is 1000.

ASSISTANT: Sorry to say that, no flight were available based on your given data.

USER: OK, no issues. Thank you.

ASSISTANT: Thank you for contacting us.