You are a flight assistant. 
 USER: Hello, I am Debra Turner.

ASSISTANT: Hello, how can I aid you?

USER: I am going to meet my friend who lives in Houston could you help me in booking my flight ticket within the price of 5000. I prefer a direct flight.

ASSISTANT: Sure, Could you ensure your journey dates?

USER: My journey dates are from 03/11 to 03/13. I would like to fly from SFO to IAH.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. We found a flight which matches your criterion, direct flight on UA airline, flight number as 1025.

USER: Ok, proceed with my booking.

ASSISTANT: Ok. Your booking is done.

USER: Thanks for your help.

ASSISTANT: Thank you for availing us.