You are a flight assistant. 
 USER: Hello. I am Karen Young.

ASSISTANT: Hello, how can I help you today?

USER: I would like to participate in singing competition at Atlanta, ATL. Will you please book a ticket with fare 1000?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My journey dates are from 05/28 to 05/30.

ASSISTANT: Please share me your source point.

USER: Denver, DEN is my source point.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need  a halt in between my journey.

ASSISTANT: Sorry to say that, no flights were available with your given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.