You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: Please book me a ticket from SFO to AUS.

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travelling dates are from 11/24 to 11/26.

ASSISTANT: May I know your name?

USER: I am Paul Gonzalez.

ASSISTANT: Sorry, No flights found with your travel dates.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for opting us.