You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to visit the National Geographic Museum in DCA, can you assist me to book a flight ticket from MSP?

ASSISTANT: Sure, can you share your journey dates?

USER: I will start on April 22nd and return back on April 24th.

ASSISTANT: Do you have any other preferences?

USER: Yes, I am looking for a connecting flight under price limit 500.

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

USER: Oh ok, thank you anyway.

ASSISTANT: Thank you for reaching us. May I know your name?

USER: My name is Anna Anderson.

ASSISTANT: Thank you.