You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book a flight ticket to visit the Detroit to meet my childhood friend, can you find a flight for me?

ASSISTANT: Sure, will you provide your airport codes please?

USER: Sure, my source region is from SEA and destination is DTW.

ASSISTANT: Please provide your travelling dates that you want to travel.

USER: The dates that I am moving is 09/29 and 10/01.

ASSISTANT: Please give me a moment.

USER: Sure, make that I need a ticket cost under 200.

ASSISTANT: Please provide your name for booking the ticket.

USER: My name is Joshua Miller.

ASSISTANT: There is no flights found under your requested details.

USER: Ok, I prefer to reach other booking agencies to find a flight for me. Thank you for your searching and your help.

ASSISTANT: Welcome, have a great day.