You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I would like to visit Denver, can you please help me to book my flight ticket from PHL to DEN?

ASSISTANT: Sure, can I know the travel dates please?

USER: Thank you. I have to depart on Mar 24th and return back on Mar 26th.

ASSISTANT: May I know your name please?

USER: My name is Donna Lewis.

ASSISTANT: Do you have any requirements?

USER: I only prefer for an economy class.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a connecting flight in Delta airline, can I book it?

USER: That's perfect! You can book the ticket for me.

ASSISTANT: Your ticket has been booked with flight number 1017.

USER: Thank you so much.

ASSISTANT: You are welcome.