You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me in booking a flight ticket to ORD from AUS?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are from Oct 27 to Oct 29.

ASSISTANT: Please share me your name.

USER: I am Helen Hernandez.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight in my journey.

ASSISTANT: Sorry, there is no flight at this moment.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you.