You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me to book a flight ticket from DEN to PHX?

ASSISTANT: May I know on which dates you are willing to travel?

USER: My travelling dates are 21 and 23 of May.

ASSISTANT: Do you require any connections?

USER: I need a connecting flight.

ASSISTANT: May I know your specifications?

USER: No.

ASSISTANT: Spirit airlines is providing a connected flight in economy class.

USER: Please proceed.

ASSISTANT: May I know your name?

USER: I am Nicole Taylor.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you.