You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you please help me in booking a flight ticket from OAK to HOU?

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

USER: My planned dates of journey are June 15 and June 17.

ASSISTANT: Can I know your name please?

USER: My name is Larry Jones.

ASSISTANT: Do you need any specifications in airlines?

USER: I prefer direct flight for this trip.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.