You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight from IAH to DFW, can you help me out?

ASSISTANT: Sure, let me know your travelling dates.

USER: My trip dates are from Dec 2nd till Dec 4th.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I am comfortable with direct flight.

ASSISTANT: Please share your class preference.

USER: I don't have.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Myself Kenneth Smith.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.