You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Kevin Hernandez. I want to book a flight ticket from ORD to AUS. Could you help me in booking?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travelling dates are from 11/24 to 11/26.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.