You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am looking for a flight from DFW to LAS, can you help me out?

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

USER: Sure, my trip dates are from Jan 7th till Jan 9th.

ASSISTANT: May I know your name please?

USER: Myself Carolyn Green.

ASSISTANT: Do you have any requirements?

USER: I need my return flight in evening.

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

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for approaching us.