You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me to book a ticket from DEN to LAX?

ASSISTANT: Sure, may I know your name please?

USER: Charles Lee here.

ASSISTANT: Sure, may I know your travelling dates please?

USER: My travelling dates will be on Mar 22 to Mar 24.

ASSISTANT: Sure, may I know your connection limit please?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications please?

USER: I would prefer economy class.

ASSISTANT: There is a direct flight of fare 100 with economy class in Southwest airline, shall I proceed?

USER: You can proceed.

ASSISTANT: Ok, your reservation has been confirmed with flight number 1018.

USER: Thank you.

ASSISTANT: You are welcome.