You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ruth Walker.

ASSISTANT: How may I help you today?

USER: Actually my friends are planned for the trip, so I am also willing to travel to Chicago-ORD along with them. Can you please help me in ticket booking from HOU?

ASSISTANT: Sure, I am happy to help me. Can I know your travelling dates?

USER: Thank you. My travelling dates are 07/11 and 07/13.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Oh! It is so sad to hear from our end. Anyways thank you for searching for the flight.

ASSISTANT: Thank you for approaching us.