You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Ronald Lopez.

ASSISTANT: Ok.

USER:  I am planning to visit Houston, will you help me in booking the flight ticket from IAD to HOU?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: My planned travel dates are Dec, 20 and Dec, 22.

ASSISTANT: Do you have any specifications?

USER: I need a halt with a price limit of 1000.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting, we found connecting flight 1020 in Spirit airline with fare of 200. Shall I proceed to book?

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.