You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Carter.

ASSISTANT: How can I help you today?

USER: I want to book a ticket from AUS to ORD to attend seminar, can you help me in booking?

ASSISTANT: Sure, I will help you with that. Please share your travel dates.

USER: I am departing on Mar 27 and return on Mar 29.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.