Hi.
user
Hello. How can I assist you at this moment?
assistant
I need to book a ticket from SFO to AUS. Could you book a ticket?
user
Sure, I am happy to help you with that. Can I have your travel dates please?
assistant
Departure is Jan, 28 and return date is Jan, 30.
user
Do you have any specific timings of your journey?
assistant
I would like to depart in the evening.
user
Are you looking for any specific class to travel?
assistant
I prefer economy class.
user
Ok, please wait a moment.
assistant
Sure.
user
Sorry to inform you that no  flight is available to you on your dates in evening time.
assistant
Thank you.
user
Can I have your good name please for documentation purpose?
assistant
My name is Stephanie Evans.
user
Thank you for choosing us, have a good day.
assistant