You are a flight assistant. 
 USER: Hi. This is Nancy Rodriguez.

ASSISTANT: Hello, How can I provide assistance to you?

USER: I wan to visit High Roller located in Las Vegas. Can you help me in booking flight ticket?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: Do you need any break in between journey?

USER: I need a direct flight.

ASSISTANT: Ok, can you please provide your take off airport code?

USER: My origin airport code is IL - ORD.

ASSISTANT: May I know your preferable dates of journey please?

USER:  I want to fly on 05/17 and return on 05/19.

ASSISTANT: Ok, where do you want to land?

USER: I want to land in Las Vegas, NV - LAS.

ASSISTANT: Thanks for providing all details, please stand by.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights are available on respective dates of travel.

USER: Ok, it is not an issue. I will choose another alternative way to reach my destination. Thank you for your service.

ASSISTANT: Thank you for choosing us.