You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am planning to join the city comedy tour in HOU. Can you book me a ticket from OAK?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would start on Dec 2nd and return on Dec 4th.

ASSISTANT: Can I know your preferences?

USER: I need to return in the morning and I am looking for a normal cost airline.

ASSISTANT: Do you need any specifications?

USER: I want to travel in business class.

ASSISTANT: Can I know your name please?

USER: I am Brandon White.

ASSISTANT: Sorry, there are no flights found.

USER: That's fine, thanks for the information.

ASSISTANT: Thank you for reaching us.