You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to go for a Christmas shopping at Charlotte with my sister, can you please book my ticket?

ASSISTANT: Sure, can you please help me with your journey dates?

USER: My trip dates are from 12/03 to 12/05.

ASSISTANT: May I know your airport codes?

USER: My journey starts from Denver, CO-DEN to Charlotte, NC-CLT.

ASSISTANT: Can you please help me with your name?

USER: I am Jennifer Lewis.

ASSISTANT: Thank you for your details Jennifer Lewis. A flight with price 200 having single connection is found in UA airline. Shall I proceed with it?

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is confirmed in flight number 1002.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.