You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to travel from AUS to LAS.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are 09/07 to 09/09.

ASSISTANT: May I know your name?

USER: I am Dorothy Lopez.

ASSISTANT: I am sorry no flights available on your dates.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you.