You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you at this moment?

USER: I am James Hill. I want to book a ticket from DFW to CLT to attend seminar, can you help me in booking?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: I am departing on 09/02 and return on 09/04.

ASSISTANT: Can I have a moment?

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight available on your travelling dates.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome, have a nice day.