You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I am looking for a flight from OAK to HOU. Can you please help me with booking?

ASSISTANT: I am here to help you about that. Can you please provide your planned dates of journey?

USER: My planned travel dates are from July 23 to July 25.

ASSISTANT: Do you need any connecting flight for your journey?

USER: Yes, I need a connecting flight in my journey.

ASSISTANT: Can you please provide your name for further booking purpose?

USER: Sure, you can book this ticket in the name of David Smith.

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

USER: Yes, I need to book my ticket in Business class.

ASSISTANT: Sorry to say this David Smith, there are no flights which travels on your route as per your planned dates.

USER: Not an issue, anyway thank you for the information.

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