You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Emma Rodriguez. Can you help me in booking my flight ticket from AUS to LGA?

ASSISTANT: Sure, I am here to help.

USER: Thank you.

ASSISTANT: May I know when are you planning your trip to New York?

USER: I want to start on Sep 17th.

ASSISTANT: Ok, when will you return back to Austin?

USER: I will take my return flight on Sep 19th.

ASSISTANT: Do you prefer either business or economy class?

USER: I need a economy class.

ASSISTANT: Thank you for the details, please wait for a while.

USER: Sure.

ASSISTANT: Sorry there is no flight available on given dates from you.

USER: Its ok, thank you.

ASSISTANT: Thank you.