You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Gregory Mitchell. I am looking for a cheapest flight possible with in price under 200 to Houston, TX - HOU. Can you please help me to book a flight ticket?

ASSISTANT: Sure, can you please share your journey dates?

USER: My journey dates are from 09/21 to 09/23.

ASSISTANT: May I know your origin airport code please?

USER: My source airport code is Seattle, WA-SEA.

ASSISTANT: Do you have any specifications?

USER: I need a halt in between my journey.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: We found a flight with Delta airlines, flight number is 1007 with one connection and price is 100.

USER: Please, proceed with my booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for your assistance.

ASSISTANT: Thanks for choosing us.