Hello, I am Dennis Mitchell.
user
Hello, how can I help you?
assistant
I want to book a flight as I have to meet  my brother.
user
Sure, Can you please provide me your journey details?
assistant
I want to travel from AUS on 04/05 to LGA on 04/07.
user
Thank you for the details. Please wait a while, I will check with the availability and get you back.
assistant
Sure.
user
Thank you for waiting, We are sorry to inform you that there were no flights available according to provided information.
assistant
Ok, thanks for the information.
user
Thank you for reaching us, Have a nice day.
assistant