You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you today?

USER: I am David Moore. I want to travel from Washington DC - IAD to New York, NY - JFK. Can you book me a ticket?

ASSISTANT: Sure, Can you please provide your journey dates?

USER: Yes, I would start my journey on Sept/30 and end on Oct/02. Please make sure that the price limit must be 5000 and connection limit is 1.

ASSISTANT: OK, please wait for a couple of minutes, I will check the availability of flight and get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, we did not find any flight based on your details.

USER: OK. Thanks for the response.

ASSISTANT: Thanks for choosing us.