You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I would like to book a ticket from JFK to DFW, can you please help me out?

ASSISTANT: May I know your trip dates?

USER: I am travelling on these dates Sept 22nd and 24th.

ASSISTANT: Do you prefer any connections?

USER: I need single connected flight.

ASSISTANT: Are you looking for any specifications?

USER: I prefer return in the morning.

ASSISTANT: There is a connected flight in Frontier airlines with the fare 300.

USER: I need normal-cost airlines.

ASSISTANT: Sorry, there are no flights available in normal cost.

USER: Ok no problem, thank you for your services.

ASSISTANT: May I know your name?

USER: David Harris here.

ASSISTANT: Thank you.