You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Will you please book me a plane ticket from DEN to CLT?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: I will start on Nov 10 and return on Nov 12.

ASSISTANT: Can you please share your connection limit?

USER: I need 1 stop over.

ASSISTANT: Do you have any other specifications?

USER: My depart and return time must be in the evening.

ASSISTANT: May I know your name please?

USER: I am Jennifer Rodriguez.

ASSISTANT: Jennifer Rodriguez, there are no flights available in your route.

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

ASSISTANT: Thank you for choosing us.