You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am William Nelson, can you find a flight which flies with single connection?

ASSISTANT: Sure, when are you planning to start and return on?

USER: Ok, my preferable dates are from Feb 13 to 15.

ASSISTANT: Which airports do you prefer to take off and land on?

USER: My locations are from AUS to HOU.

ASSISTANT: May I know your depart and return timing?

USER: Yes, I would like to departure in the afternoon time.

ASSISTANT: Do you need a economy class or a business class?

USER: I am ok with any class.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Not an issue, I will find an alternative. Thanks for your time.

ASSISTANT: Thank you.