You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I need to book a flight ticket from CLT to SEA, Can you please help me for booking?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would like to travel on 01/21 to return on 01/23.

ASSISTANT: Can I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you need any specifications in airlines?

USER: I am comfortable with business class.

ASSISTANT: Can I know your name please?

USER: Dennis Gonzalez here.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.