You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: David Davis here.

ASSISTANT: How can I assist you at this moment?

USER: Can you please help me in booking the ticket from CLT to DCA?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: Sure, my journey dates are 09/05 and 09/07.

ASSISTANT: Ok, please be hold on for a moment to check for flight availability.

USER: Sure, I'll wait.

ASSISTANT: Yes, I have found a flight in Delta airlines with connection 0 and price 200, is it ok for you?

USER: Please search for a flight with 1 halt.

ASSISTANT: Sorry David Davis, no flight is available to you with connection 1.

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

ASSISTANT: Thank you for choosing us, have a good day.