You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Can you reserve me a ticket from HOU to OAK?

ASSISTANT: Sure, please share your travel dates.

USER: My trip dates are July 01 to 03.

ASSISTANT: Do you need a stopover?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: I need business class.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Christine Young.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us.