You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I am planning to book a flight from ORD to IAH, so please help me.

ASSISTANT: Sure, we are here to help you. Do you prefer a connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Could I have your journey dates, please?

USER: My planned dates are on Nov 12th to 14th.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any more specifications?

USER: My return time is afternoon.

ASSISTANT: May I know your good name?

USER: Sure, my name is Kathleen Williams.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your route as per your given requirements.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.