You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what assistance are you looking for?

USER: I am Nicholas Anderson. I am planning to visit Downtown Aquarium at Houston, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you out. Can you share your itinerary dates?

USER: I would like to take off on 01/30 and return on 02/01.

ASSISTANT: Noted, can I have your nearby airport abbreviates?

USER: My nearest source airport code is PHL and destination airport code is HOU.

ASSISTANT: Well, please hold on for a while.

USER: Sure.

ASSISTANT: There is a flight available with Spirit airlines having 1 stopover, shall I continue?

USER: Please proceed with the booking if the ticket fare is less than 200.

ASSISTANT: Your ticket is successfully confirmed with flight number 1017. Happy journey.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for reaching us. Have a nice day.