You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you for today?

USER: I'm Paul Mitchell.

ASSISTANT: Ok.

USER:  I am planning to travels from DCA to AUS for a business meeting, can you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you with that. May I know the travelling dates of your journey?

USER: Sure, my departure date is on 02/15 and the return date is on 02/17.

ASSISTANT: Please wait for a while.

USER: Sure, please make sure that the connection limit is 0.

ASSISTANT: Sorry Paul, there are no flights found on your requirement.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Is there any other dates to travel? Thank you for choosing us, have a nice day.

USER: You are welcome.