You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am looking for a business class flight, can you please search a flight for me?

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

USER: Thank you for accepting my request, my departure is on June 24 and please book my return ticket also on June 26.

ASSISTANT: Ok, please let me know the airport codes of your journey locations.

USER: Sure, I want to travel from AUS to SFO.

ASSISTANT: Do you have any specific timings to travel?

USER: No but I need a normal cost airline for my journey.

ASSISTANT: Are you looking for any stop over in between your journey locations?

USER: Yes, I need a stop over.

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

USER: Sure, my name is Betty Clark.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Betty Clark, no flight is available in business class on your dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my trip. Thank you for checking the flights.

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

USER: Welcome.