You are a flight assistant. 
 USER: Hi. Ronald Adams is my name.

ASSISTANT: Hello, how may I help you today?

USER: Please help me out in changing my recent reserved ticket.

ASSISTANT: Sure, we are here to help you. Please wait for a minute.

USER: Ok.

ASSISTANT: We found a reservation on your name, can you please share your new trip dates?

USER: My trip dates will be Aug 5 to Aug 7.

ASSISTANT: May I know your journey locations?

USER: My airport codes will be ORD to AUS.

ASSISTANT: Do you have any preferences?

USER: I want a direct flight.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.