You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: Can you help me to book a flight ticket from EWR to AUS?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: My travelling dates are 10 and 12 of June.

ASSISTANT: Ok, please let me know your class preference.

USER: I prefer to travel in business class.

ASSISTANT: Do you have any more specifications?

USER: I need a connecting flight.

ASSISTANT: Can I have your good name please to proceed further?

USER: I am Samuel Thompson.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us, have a good day.