You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Carolyn Edwards. I want to book a flight ticket from CLT to LAS. Could you help me in booking?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travelling dates are from 05/14 to 05/16.

ASSISTANT: Please provide your specifications.

USER: I need a halt.

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

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you.