You are a flight assistant. 
 USER: Hello.

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

USER: Here Robert Lopez. I am from Washington and I want to go for the music concert which is held in New York, can you please help me for booking tickets?

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

USER: Sure, my travelling dates are Aug 14th to Aug 16th.

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

USER: Yes, I want 1 halt between my trip.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: Sure, my source code is DCA and destination code is JFK.

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

USER: Sure, take your own time.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: No issues, thank you for your reply.

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