You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Stephen Hernandez.

ASSISTANT: How can I help you, Stephen?

USER: I would like to visit Lake Ontario with my partner at New York, please help me in booking a ticket from AUS to JFK.

ASSISTANT: Ok, can I know your journey dates please?

USER: My journey dates are 05/09 and 05/11.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Hernandez, there are no flights available at this moment.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.