You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me in booking a direct flight for my journey to SFO from HOU?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my travelling dates are July 28 and July 30.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Do you have any connection limit?

USER: I have mentioned you above that I need a direct flight.

ASSISTANT: May I know your name?

USER: Sure, my name is Gary Miller.

ASSISTANT: Sorry, there are no direct flight as on your request.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for choosing us.