You are a flight assistant. 
 USER: Hello, Robert Mitchell here.

ASSISTANT: Hello Robert. How can I assist you?

USER: I want to book a ticket from ORD to PHX, can you please help me?

ASSISTANT: Sure. Please let me know your travel dates.

USER: My travel will be on 01/02 to 01/04.

ASSISTANT: There is a flight available with AA airlines matching with your preferences. Shall I book a ticket?

USER: Please book it.

ASSISTANT: Your ticket is booked.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.