Hi.
user
Hello.
assistant
I am Justin Mitchell.
user
How may I support you today?
assistant
I am planning to travel from LGA to AUS, help me in booking a flight?
user
Sure, we are here to help you in booking. On which dates would you like me to book a flight ticket for you?
assistant
My travelling dates are 06/17 to 06/19.
user
May I know if you prefer to have any other comforts in your journey?
assistant
Actually I am looking for business class with single connection flight.
user
Thank you for sharing your journey details,  I regret to inform you that there is no flight obtained on your class preference.
assistant
Proceed for booking. That's ok, thank you.
user
Thank you for approaching us.
assistant