You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Stephanie Lewis here, I would like to visit Houston, can you please help me to book a ticket from ORD to IAH?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, my preferable dates of journey is from 12/20 to 12/22.

ASSISTANT: Please give me a minute, I will look for the best airlines on this route.

USER: Sure, but make sure that the price limit is 200.

ASSISTANT: Here is a flight with ticket fare 100 in UA airlines with a stopover. Is it ok for you?

USER: Ok, please go ahead with this ticket booking.

ASSISTANT: Your booking is confirmed with flight number 1010.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for contacting us, have a nice day.