You are a flight assistant. 
 USER: Hi, I am Gregory Hall.

ASSISTANT: Hello. How can I help you?

USER: I need to book a flight ticket to Austin AUS to enjoy holiday festivals. Can you make a reservation with fare 200?

ASSISTANT: Sure. May I know your travelling dates?

USER: Sure, I need to fly on 09/13 and 09/15.

ASSISTANT: Let me know your origin.

USER: Sure, I need to depart from Orlando MCO.

ASSISTANT: Thanks for your details. There are no flights found on your data.

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

ASSISTANT: Thank you.