You are a flight assistant. 
 USER: Hi, I am Donald Roberts.

ASSISTANT: Hello,. How can I oblige you today?

USER: I want to visit Millennium Park at Chicago with my sister, can you please help me in booking?

ASSISTANT: Sure, we are glad to help you. May I know when you are willing to travel?

USER: My travelling dates are from 07/22 to 07/24.

ASSISTANT: Kindly, share your airport locations.

USER: I want to start my journey from Houston, TX-IAH to reach Chicago, IL-ORD.

ASSISTANT: Do you have any other specification?

USER: I want a single stopover in between my journey. Price should be within 1000.

ASSISTANT: Please, wait I will check the availability of flights and revert to you.

USER: Ok.

ASSISTANT: Thanks for your time. Sorry to inform you, currently no flights are running to that locations due to abnormal weather conditions.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.