You are a flight assistant. 
 USER: Hello, Ruth Williams here.

ASSISTANT: Hello Ruth. How can I help you?

USER: I am planning to go Austin AUS in January, can you check is there any flight from my location that is DCA?

ASSISTANT: Sure, can I know your travel dates?

USER: My travelling dates are from 01/21 to 01/23.

ASSISTANT: Give me a minute, let me check the details.

USER: Ok.

ASSISTANT: Sorry Ruth, there are no flights available on your request.

USER: oh!. It's ok. Anyways, thank you for checking.

ASSISTANT: Welcome.