You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Dennis Wright.

ASSISTANT: Nice to meet you Dennis Wright.

USER: I want to book a ticket,can you help me out?

ASSISTANT: Sure. Please provide your travelling location names.

USER: I want to go from CA-OAK on 08/13. I want to return from TX-DFW on 08/15.

ASSISTANT: Do you have any other special requirements?

USER: Yes,my connection limit is 1 and price is 5000.

ASSISTANT: Sorry Dennis Wright,as per your requested dates no flight available.

USER: OK,thank you.

ASSISTANT: Your welcome.