You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I provide assistance to you?

USER: I am Carolyn Baker, I want to book a flight ticket from Houston to host a program at Detroit, help me in booking my flight ticket.

ASSISTANT: Sure, kindly assign your corresponding airport codes?

USER: My source point is TX-IAH, I want to land at the nearest airport MI-DTW.

ASSISTANT: How much you can afford for ticket fare?

USER: I can afford up to 500.

ASSISTANT: May I know on what dates would you like to travel?

USER: I want to travel on 10/25 to 10/27.

ASSISTANT: Do you require any stopovers in your journey?

USER: I need a stopover with in your journey.

ASSISTANT: Sorry to inform you that, unfortunately there is no flights available by the given details.

USER: Its ok, thank you for your effort.

ASSISTANT: Thank you for choosing us.