You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER:  I am Debra Roberts want to visit Navy Pier with my friends at Chicago,IL-ORD. Can you help me in booking a connecting flight?

ASSISTANT: Sure, can you please help me to share your travel dates?

USER: My travel dates are 12/17 and 12/19.

ASSISTANT: May I know your origin airport code?

USER: I will depart from Houston,TX-HOU.

ASSISTANT: Please wait for a while. Sorry, there is no flight found on your given name.

USER: Ok.

ASSISTANT: Thanks for choosing us.

USER: Thank you.