You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am William Carter.

ASSISTANT: How can I help you?

USER: I want to book a ticket from PHX to PHX.

ASSISTANT: Sure, can I know your travel dates please?

USER: My journey dates are from 03/27 to 03/29.

ASSISTANT: Ok, wait a moment. There is a flight with number 1015 and airline is Delta. Shall I  book it?

USER: Book the ticket.

ASSISTANT: I have booked your ticket.

USER: Thank you.

ASSISTANT: Thank you for reaching us.