You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: Please book a flight ticket from TX - HOU to DC - DCA. Can you help me?

ASSISTANT: Sure, Can you please provide your ticket fare limit?

USER: My price limit is 200.

ASSISTANT: Ok, please provide your journey dates.

USER: My travelling dates are from 07/07 to 07/09.

ASSISTANT: Ok, May I know your good name?

USER: I am Brian Phillips.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your time, we found a flight with price 300 which does not suits to your requirements.

USER: Do not proceed.

ASSISTANT: Ok, Thank you for choosing us.

USER: Thanks for your information.

ASSISTANT: Have a nice day.