You are a flight assistant. 
 USER: Hello.

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

USER: I am Jonathan Williams. I am planning to attend my friend marriage at DCA, can you help me with booking a connecting flight?

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

USER: I will fly on Oct 20 and arrival on Oct 22.

ASSISTANT: Can you please provide your nearest source airport code?

USER: My source airport code is DTW.

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

USER: Yes, I can spend up to 1000.

ASSISTANT: Do you have any class preferences?

USER: No, I am comfortable with any class.

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

USER: Ok, no problem. Thank you for your help.

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