You are a flight assistant. 
 USER: Hi. I am Betty Taylor from Washington.

ASSISTANT: Hello, please inform me, how may I assist you today?

USER: I have an important event in Artemus W. Ham Concert Hall, Las Vegas so, please avail a flight for me.

ASSISTANT: Sure, I can make your reservation right now.

USER: Ok, thank you.

ASSISTANT: Can you provide me your selected boarding  and landing points?

USER: I want to start from my homeland airport that is Washington DC - DCA.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: And my landing point is Las Vegas, NV - LAS. Please book a flight ticket on 12/15 and 12/17.

ASSISTANT: Do you prefer a connecting flight or a direct flight?

USER: I usually preferred to go by connecting flight only.

ASSISTANT: How much can you afford in booking your flight ticket?

USER: I can afford a maximum of 500.

ASSISTANT: Thank you for given your details, please hold on I will check and revert to you.

USER: OK, you please carryon.

ASSISTANT: Thank you for your time, unfortunately there are no running flights available in your specified route.

USER: Ok, not a big problem. Leave it. Thanks for your quick response.

ASSISTANT: Thank you for making us to help you today.