You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephen Robinson.

ASSISTANT: How can I help you today?

USER: Book a flight from Phoenix, PHX to Seattle, SEA under 500 fare.

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: Sure, 12/08 and 12/10 are my travelling dates that I have planned to travel.

ASSISTANT: Please give me a moment.

USER: OK.

ASSISTANT: Here, I found a flight for you with single connection. Shall I proceed for booking?

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked with flight number 1007 and airline is Delta.

USER: Thank you.

ASSISTANT: Welcome, have a safe flight.