You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to book a ticket from BOS to DEN. Can you please help me out?

ASSISTANT: Sure, can you share your travel dates please?

USER: I am planning to travel on Apr 21 and return back on Apr 23.

ASSISTANT: May I know your good name?

USER: My name is Barbara Carter.

ASSISTANT: Please share your connection limit.

USER: I am looking for a connecting flight.

ASSISTANT: Any more specifications do you have?

USER: I am looking for a normal cost airline.

ASSISTANT: Sorry, there is no flight service available on your required routes.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.