You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Could you book my ticket in a direct flight?

ASSISTANT: Sure, May I know the journey dates?

USER: I want to travel on Aug 18 and Aug 20.

ASSISTANT: Please help me with your journey codes.

USER: I want to travel from HOU to ORD.

ASSISTANT: Do you have any connection limit?

USER: I already mentioned.

ASSISTANT: Sorry, Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Sharon Robinson here.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.