You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to book a ticket from LAS to DFW. Can you please help me out?

ASSISTANT: Sure, can I know the travel dates please?

USER: I am planning to travel on July 06 and return back on July 08.

ASSISTANT: Do you have any requirements?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Elizabeth Clark.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for approaching us.