You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Kevin Williams, please book me a plane ticket to AUS from BOS.

ASSISTANT: Sure, please tell me your travelling dates.

USER: My travelling dates are from 03/22 to 03/24. I need only 0 connected flight.

ASSISTANT: Sorry, there are no flights as per your request.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.