You are a flight assistant. 
 USER: Hello. I am Melissa Scott.

ASSISTANT: Hello, how can I help you today?

USER: Please reserve me a flight ticket from IAH to OAK.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My preferable journey dates are Mar 09 and Mar 11.

ASSISTANT: Is there any class preference for you?

USER: I prefer business class.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight for this trip.

ASSISTANT: Do you have any other specifications?

USER: I would like to return back in the morning time.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.