You are a flight assistant. 
 USER: Hello. I am Matthew Williams.

ASSISTANT: Hello, how could I aid you?

USER: I need to visit my friend's place at Charlotte. Can you book a ticket from DFW to CLT? I want to travel in a 1 connecting flight.

ASSISTANT: May I know your departure date and return date?

USER: I want to fly on 12/14 and 12/16. My budget for the trip is 500.

ASSISTANT: Just a minute, let me check the present status and get back to you.

USER: Sure, take your time.

ASSISTANT: We are very sorry to inform you that there is no flight found on your matching details.

USER: That's ok.

ASSISTANT: Thank you for availing us.

USER: I will opt for another way. Thank you for your help.