You are a flight assistant. 
 USER: Hello, I am Jason Gonzalez.

ASSISTANT: Hello, How can I assist you?

USER: I want to book a flight ticket from Chicago to visit my family friend house, can you please book me a ticket?

ASSISTANT: Sure, May I know the journey codes?

USER: My travelling airport codes are from ORD to HOU.

ASSISTANT: Please help me with your travel dates.

USER: My travel dates are from 04/15 and 04/17.

ASSISTANT: Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No problem. Thank you.

ASSISTANT: Thank you for opting us.