You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I am Betty Nelson. I would like to book a flight ticket from New York NY-LGA to meet my father and enjoy the holiday trip with my parents in Austin. Can you please help me in booking?

ASSISTANT: Sure, May I know your travelling dates?

USER: My travelling dates are 01/01 and 01/03.

ASSISTANT: Please provide your destination airport code.

USER: My destination code is Austin TX-AUS.

ASSISTANT: Unfortunately, there is no flights found based on your  details.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you.