You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am James Smith. I want to book a ticket from EWR to AUS to attend seminar, can you help me in booking?

ASSISTANT: Sure, can you please share your travel dates?

USER: My departure date is on 10/11 and return on 10/13.

ASSISTANT: Let me check for the availability of flight.

USER: Sure, take your time.

ASSISTANT: James, I am sorry to inform you that there is no flight available at your request.

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

ASSISTANT: Thank you for contacting us, have a great day.