You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you at this moment?

USER: Could you please make me a plane reservation from CLT to DFW?

ASSISTANT: Sure, can I know your travelling dates please?

USER: I will start on Dec 16th and return on Dec 18th.

ASSISTANT: Do you need a lay by in between the journey?

USER: Yes, I need 1 lay by.

ASSISTANT: Do you have any other preferences?

USER: Yes, I would prefer a business class flight.

ASSISTANT: Can I know your good name please?

USER: I am Gary Parker.

ASSISTANT: There are no flight found on your requested dates.

USER: That's alright, thanks for your assistance.

ASSISTANT: Thank you for reaching us.