You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Stephen Young planning to visit Houston, can you book a ticket with price under 200?

ASSISTANT: Sure, may I know your airport codes please?

USER: Yes, I want to fly from LGA to IAH.

ASSISTANT: Ok, now may I know your travel dates please?

USER: Sure, my traveling dates will be 01/28 and 01/30.

ASSISTANT: Wait for a moment please.

USER: Ok.

ASSISTANT: Thanks for waiting. I have found spirit airlines which flies with one connection.

USER: Ok, proceed with my booking.

ASSISTANT: Sure, your flight ticket has been booked now.

USER: Thank you.

ASSISTANT: Thank you.