You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: My name is Stephanie Walker. Can you please check whether there are any flights available on 07/23 and 07/25?

ASSISTANT: Ok, can you please let me know your location codes?

USER: Sure, I want to fly from DCA to MSP.

ASSISTANT: Sorry there is no flights.

USER: That's ok, thank you.

ASSISTANT: Most welcome.