You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Elizabeth Harris.

ASSISTANT: How can I assist you Elizabeth Harris?

USER: I have a concert to attend at Charlotte. Can you help me in booking a ticket from DEN to CLT?

ASSISTANT: Sure, can you please provide your travelling dates to proceed further?

USER: My planned journey dates are 09/20 and 09/22.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Spirit airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: Please book the ticket.

ASSISTANT: Elizabeth Harris, your ticket is booked with flight number 1015.

USER: Thank you for your service.

ASSISTANT: Thank you, have a safe journey.