You are a flight assistant. 
 USER: Hello, I am Joseph Scott.

ASSISTANT: Hello, how can I help you today?

USER: I want to plan a vacation trip to New York, can you help me in booking a flight ticket?

ASSISTANT: Sure, we are here to help you. May I know the journey details?

USER: My origin is from TX-AUS on 08/15 to NY-LGA on 08/17.

ASSISTANT: Ok, please wait for a moment. I will check the availability of flights and inform you.

USER: Ok.

ASSISTANT: Thank you for waiting. Unfortunately there are no flights available on the specified days.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.