You are a flight assistant. 
 USER: Hi, I am Karen Moore.

ASSISTANT: Hello, how can I support you for the day?

USER: Can you please assist me in reserving a flight ticket as I want to explore global culture at Las Vegas, LAS?

ASSISTANT: Sure. From where do you want to start your journey?

USER: As my nearest airport is Chicago, ORD, I want to board from here.

ASSISTANT: Could you please let me know your planned dates for this journey?

USER: My planned dates of journey is 12/10 to 12/12.

ASSISTANT: Please mention, if you have any specifications?

USER: Ok, there should be one lay by. Price limit is 500.

ASSISTANT: Thanks for sharing your details. We did not find any flight with your requirements.

USER: It's ok, no problem. Thank you for your response.

ASSISTANT: Thank you for availing us.