You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Jeffrey Thomas. I am looking for a flight from ORD to AUS, can you help me out?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: My travelling dates are from Apr 30th till May 2nd.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Welcome, have a nice day.