You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Samuel Anderson here.

ASSISTANT: How can I help you?

USER: I want to attend a Marriage in Austin. Can you please help me for booking the flight ticket?

ASSISTANT: Let me know your travel dates.

USER: My travelling dates are 05/11 and 05/13.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are JFK and AUS.

ASSISTANT: Do you have any preferences?

USER: I would prefer nonstop flight.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thanks.