You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to book a flight ticket to DCA from LAS, can you please help me out?

ASSISTANT: May I know your travelling dates?

USER: Sure, my planned travelling dates are Apr 28 and Apr 30.

ASSISTANT: Is there any connection limit?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Do you have any other requirements?

USER: Yes, I prefer normal cost airline.

ASSISTANT: May I know your good name?

USER: Sure, my name is Samuel Carter.

ASSISTANT: United Airlines providing connecting flight in the economy class with fare 100, shall I proceed for booking?

USER: Ok, please confirm my reservation.

ASSISTANT: Your ticket has been confirmed with flight number 1022.

USER: Thank you for the help.

ASSISTANT: Thank you for opting us.