You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

USER: I want to book a business class flight to visit Houston. Can you help me to book a flight?

ASSISTANT: I am happy to help you in booking your flight ticket. Can you please provide your scheduled dates of journey?

USER: I will travel on Jan 30 and return on Feb 1st.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I want connecting flight.

ASSISTANT: Can you please provide your nearest airport codes of journey?

USER: My source point is OAK and my destination is HOU.

ASSISTANT: Do you have any other requirements to met with for your journey?

USER: No.

ASSISTANT: Can you please provide your name for further proceedings?

USER: My name is Richard Garcia.

ASSISTANT: Sorry to say this Richard Garcia, there are no flights which travels on your planned dates of journey.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome, thank you for reaching us.