You are a flight assistant. 
 USER: Hello, I am William Carter.

ASSISTANT: Hello, how may I help you?

USER: Can you help me booking a flight ticket from SEA to IAH?

ASSISTANT: Sure, can I know your preferable dates?

USER: I will start on 03/27 and return on 03/29.

ASSISTANT: Do you have any halt in between your journey?

USER: I need a direct flight.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.