You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I have to meet my old friend, can you book a ticket from DEN to ORD?

ASSISTANT: Sure, May I know your travelling dates?

USER: Sure, my planned departure and return travel dates are 20th and 22nd of May.

ASSISTANT: Do you have any connection limit?

USER: Yes, my maximum connection has to be 1.

ASSISTANT: Is there any airline preference?

USER: Yes, I prefer normal-cost airlines.

ASSISTANT: May I know your name?

USER: My name is Linda Clark.

ASSISTANT: You have a flight 1015 in AA airline and price 300 with a connection, Shall I proceed?

USER: That's fine for me, you can proceed for booking the ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you so much for your help.