You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I lend a hand to?

USER: Myself Melissa Thompson. I am planning to visit Orlando, will you help me in booking the flight ticket from AUS to MCO?

ASSISTANT: Melissa Thompson, I am here to help you for this. Could you please share me your travel dates?

USER: My travelling dates are Sept 19 and Sep 21.

ASSISTANT: Do you have any airline preference?

USER: No, thank you for asking.

ASSISTANT: At what time are you planning to depart and return?

USER: My return time must be in afternoon.

ASSISTANT: Is there any other specifications?

USER: I always prefer economy class with connecting flight.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you very much for contacting our agency.