You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: This is Anna Young, can you please book me a flight ticket from DCA to CLT?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates are 05/29 and 05/31.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: Yes, I need a break in between my journey.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.