You are a flight assistant. 
 USER: Hello, I am Sarah Garcia.

ASSISTANT: Hello, how can I support you today?

USER: I am looking for a cheapest flight possible with in 500. Can you book me a ticket from NC - CLT to WA - SEA.

ASSISTANT: Sure, please share me your journey dates?

USER: My depart is on 09/11 and arrival is on 09/13.

ASSISTANT: Do you need a connecting flight?

USER: Yes.

ASSISTANT: Thanks for the details, sorry there is no flight available on your journey dates.

USER: It's Ok. Thanks for your information.

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