You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: I'm Stephanie Martinez, planning to visit Houston city. Can you please book me a ticket from JFK to IAH?

ASSISTANT: Sure, do you have any specifications?

USER: Sure, I need a ticket fare under 500.

ASSISTANT: May I know your travelling dates?

USER: My preferable journey dates are from 09/07 to 09/09.

ASSISTANT: Give me a minute.

USER: Sure, take your own time.

ASSISTANT: There is a flight in airline Spirit with number 1012, the fare is 200 with 1 connection.

USER: Please book my ticket with this flight.

ASSISTANT: Your ticket is reserved, have  a safe flight.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for opting us.