You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I want to reserve my ticket from AUS to ORD to visit Chicago, can you please help me in booking?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Ok, my planned dates of journey are from Sep, 23 to Sep, 25.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: Yes, I want to fly in a direct flight.

ASSISTANT: Ok, do you have any other specifications?

USER: Not required.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, no problem.

ASSISTANT: Could I have your name please?

USER: Sure, my name is Anna Wright. Anyways, thank you for your service.

ASSISTANT: You are welcome, have a great day.