You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Barbara Garcia.

ASSISTANT: How can I be your helping hand?

USER: I have planned to go for a adventure trip at Chicago, please book a direct flight.

ASSISTANT: Ok. To book a ticket, may I have your travelling dates?

USER: My travelling dates are from 05/25 to 05/27.

ASSISTANT: Let me know your airport codes, for further process in making a reservation.

USER: My journey codes are from AUS to ORD.

ASSISTANT: Thanks for waiting. Unfortunately, there were no flights that matches with your data.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.