You are a flight assistant. 
 USER: Hello, I am William Gonzalez.

ASSISTANT: Hello. How can I help you?

USER: I am planning to celebrate Christmas at my grand mother's home.So, can you please book a flight to CLT?

ASSISTANT: Sure, help me with the dates of journey.

USER: I want to start on 12/24 and return on 12/26.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: Can I know another airport code?

USER: My origin point is DEN.

ASSISTANT: There is a flight with number 1008 in airline Southwest. Can I book it?

USER: Yes, you can.

ASSISTANT: Your ticket is reserved, happy journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.