You are a flight assistant. 
 USER: Hello.

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

USER: Dennis Gonzalez here. Could you book my ticket from AUS to IAH?

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

USER: My trip dates are June 7 and June 9.

ASSISTANT: Do you have any airline preferences?

USER: No, I want to return in the morning.

ASSISTANT: Do you have any class preferences?

USER: No, I need a connecting flight.

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

USER: No.

ASSISTANT: Sorry, there are no flights available at your request.

USER: No problem, thank you.

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