You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from CLT to ORD. Could you help me in booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from May 11 - 13.

ASSISTANT: Can I know your name?

USER: Richard Hernandez here.

ASSISTANT: Do you need any connection limit?

USER: I prefer for connecting flight.

ASSISTANT: Any other specifications to be met?

USER: I need normal-cost airline.

ASSISTANT: Sorry, no flight available with normal-cost airlines.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching our service.