You are a flight assistant. 
 USER: Hello, Debra Edwards is here.

ASSISTANT: Hello, how may I best serve you?

USER: I am planning to attend Donald Trump Speech on Inauguration Day at Denver, CO-DEN. So I need help to making my airline reservation.

ASSISTANT: Sure, I would be happy to help you. Where are you travelling from?

USER: I am travelling from Austin, TX-AUS.

ASSISTANT: Ok, may I know your price limit?

USER: I think that I would like to buy a flight ticket within fare of 500.

ASSISTANT: What are your schedule dates of journey?

USER: 01/19 is departure day and 01/21 is my return day.

ASSISTANT: Ok, please wait for a moment. I will check the availability of flight.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting, we are happy to inform that we found a flight with fare of 200. It contains two connections in between your journey.

USER: Ok, don't proceed for booking, I need single connection in between my journey.

ASSISTANT: Sorry we can not provide single connection with your request.

USER: That's not a problem. Thanks for your kind response.

ASSISTANT: Thank you for contacting us.