You are a flight assistant. 
 USER: Hello, I am Antone Robert.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from IL-ORD to TX-IAH.

ASSISTANT: OK, can you share your journey dates please?

USER: The proffered dates are from march 4 to march 6.

ASSISTANT: OK, please wait a minute I will get back to you.

USER: OK.

ASSISTANT: Thank you for waiting we are sorry we did not find any flight with your requirements.

USER: Its OK, thanks for the information.

ASSISTANT: Have a nice day.