You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Katherine Hall.

ASSISTANT: How can I guide you for today?

USER: I am planning to visit National Art museum at Washington, can you please help me with booking a flight ticket?

ASSISTANT: I will help you with that.

USER: Thank you.

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

USER: Sure, I would like to take off on 03/22 and return back on 03/24.

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

USER: My source airport code is IAD and the destination airport code is DCA.

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

USER: Yes, I need a flight with 1 connection.

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

USER: Sure, take your time.

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

USER: Ok, no issues. I will try another alternate way to complete my trip. Anyways, thank you for checking.

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

USER: You are welcome.