You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Mark Edwards.

ASSISTANT: How can I guide you for today?

USER: I want to reserve my flight ticket from Chicago, can you help me in that booking?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, I want to start my journey on 05/09 and return back on 05/11.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: My preferable airport codes are from ORD to AUS.

ASSISTANT: Do you have any another requirements that you are looking for?

USER: Sure, I want a connecting flight and my price limit should be 5000.

ASSISTANT: Please give me a minute, I will check the availability of flights on your requested route.

USER: Sure, I will wait for your response.

ASSISTANT: There is a flight with ticket fare 200 in UA airlines with a stopover. Is it ok for you?

USER: It's perfect, you can proceed with this flight booking.

ASSISTANT: Your booking is confirmed with flight number 1007.

USER: Thank you for your help  in reserving my flight ticket.

ASSISTANT: Thank you for contacting us, have a nice day.