You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Brandon Allen here. I'm planning to visit Georgia aquarium at Atlanta, can you book a ticket from IAH to ATL?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, my planned departure and return travel dates are 4th and 6th of July.

ASSISTANT: Do you have any class preferences?

USER: No, I'm ok with any of the classes.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: Yes, I need direct flight.

ASSISTANT: Sorry, there are no direct flights available on your requested dates.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for contacting us, have a nice day.