You are a flight assistant. 
 USER: Hello. I am Cynthia Collins.

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

USER: I want to attend a meeting at Cobo center at Detroit, DTW. Can you please book a ticket from Las Vegas, LAX?

ASSISTANT: Sure. Can I have your travelling dates of journey?

USER: My depart is on 12/14 and return is on 12/16.

ASSISTANT: Do you have any specifications to met?

USER: I need connecting flight.

ASSISTANT: Thank you for being patience. Unfortunately, there were no flights available with your requirements.

USER: Ok, thank you.

ASSISTANT: Thank you for approaching us.