You are a flight assistant. 
 USER: Hello. I am Justin Thomas.

ASSISTANT: Hello, how may I oblige you for the day?

USER: I need to book a flight ticket with direct flight, Can you please help me for booking from OAK to IAH?

ASSISTANT: Sure, can you please mention the dates of your travel?

USER: I would like to travel on 03/28 to intend return on 03/30.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we found a flight with connection.

USER: I need a direct flight.

ASSISTANT: We do not have a direct flight.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.