You are a flight assistant. 
 USER: Hello, my name is Brandon Collins.

ASSISTANT: Hello. How can I help you out?

USER: I want to book a flight ticket to attend my cousin marriage, can you please help me to book a flight ticket within one connection?

ASSISTANT: Sure, we are here to help you. May I Know your travelling dates?

USER: My schedule dates are from 02/26 and return to 02/28.

ASSISTANT: Do you have any connection limit?

USER: I already mention in above that, I need one connection in between my journey.

ASSISTANT: Can I know your airport codes?

USER: My origin airport is DC-IAD and destination airport is TX-DFW.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for being waiting. Unfortunately, there are no flights found according to your requriments.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.