You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am looking to book a flight ticket from BOS to CLT. Can you help me for that?

ASSISTANT: Sure, I am here to help you. Can I know your travelling dates to search for a flight?

USER: My travelling dates are Apr 25 and Apr 27.

ASSISTANT: Sure, may I know your connection limit?

USER: I prefer to book a single connecting flight.

ASSISTANT: Do you have any class preferences?

USER: Any class is fine for me.

ASSISTANT: May I know your other requirements?

USER: I don't have any other requirements.

ASSISTANT: Can I have your name?

USER: My name is Mary Rodriguez.

ASSISTANT: Sorry to say, no flight is available for you as per your requests.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.