You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you right now?

USER: I am Carol Allen. Can you help me in booking from ORD to AUS, as there is a musical concert to attend in Austin?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My trip dates are 04/04 to 04/06.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome.