You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Carolyn Jackson. Can you please help me to book a flight ticket from LAS - EWR?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travelling dates are 03/15 to 03/17.

ASSISTANT: Please share your specifications.

USER: My price limit is 500. I need a halt.

ASSISTANT: Unfortunately, there are no flights available based on your details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.