You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anna Johnson here.

ASSISTANT: How can I help you?

USER: I had problem in my business at Houston, can you book me a flight ticket from DFW to IAH.

ASSISTANT: Can you please provide your journey dates?

USER: My travelling dates are 01/04 to 01/06. I need a direct flight with price limit of 5000.

ASSISTANT: Please wait a moment.

USER: Ok, sure.

ASSISTANT: Thank you for waiting, there is a flight 1012 in Delta airline has the price 100.

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.