You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is George Lopez.

ASSISTANT: How may I help you today?

USER: I have a business meeting in Washington, can you help me for booking a flight ticket from DEN to IAD?

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are Oct 04 and Oct 06.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, I will wait for your response.

ASSISTANT: The Spirit airlines are providing a flight having a connection limit 2 and the ticket fare is 500. Can I proceed with the ticket booking?

USER: I need a single connecting flight.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: Welcome.