You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What type of service you are expecting from us?

USER: I am looking to book a flight ticket from DFW to MCO. Can you help me for that?

ASSISTANT: Sure, I am happy to help you with that. Can I know your travelling dates?

USER: My travelling dates are Oct 10 and Oct 12.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Sandra Parker.

ASSISTANT: Sorry to inform you that, there is no flight found based on your journey details.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: Welcome.