You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to travel from AUS to LAX, help me in booking a flight?

ASSISTANT: Yes, can you share me your travelling dates?

USER: My travelling dates are Sept 23 to 25.

ASSISTANT: Do you have any other specifications?

USER: I prefer to travelling in single connection flight.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: That's ok, thank you.

ASSISTANT: Can I know your name for documentation?

USER: I am William Walker.

ASSISTANT: Thank you for contacting us.