You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am Donald Phillips. I want to book a flight ticket from OAK to AUS. Could you help me in booking?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: My travelling dates are from April 17-19.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need 1 connecting flight.

ASSISTANT: Do you have any other requirements?

USER: My depart time should be in the evening.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, we found no flights on your given name.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.