You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to travel in a business class flight, can you please book a flight ticket for me?

ASSISTANT: Sure, when do you want to travel?

USER: I would like to depart on Sept 15 and my return would be on Sept 17.

ASSISTANT: Ok, May I know your source and destination?

USER: Sure, I want to start from SEA and land at AUS.

ASSISTANT: Ok, please help me with your connection limit.

USER: I will prefer single connection for my journey.

ASSISTANT: Ok, Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, There were no flights found with your given details.

USER: Oh! No issues, I will find another alternative.

ASSISTANT: Ok, May I know your name?

USER: Sure, my name is Donald Clark.

ASSISTANT: Ok, Thank you.

USER: Thank you for the information.

ASSISTANT: Have a nice day.