You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in booking a flight ticket from ORD to HOU?

ASSISTANT: Sure, we are here to help you. May I know your travel dates?

USER: Sure, my travel dates are Oct 27 and Oct 29.

ASSISTANT: Can you help me with your airline preference?

USER: I am not looking for airline preference.

ASSISTANT: Is there any specific time to travel?

USER: Yes, I want afternoon flight for return and take off.

ASSISTANT: May I know your good name please?

USER: Myself Christopher Williams.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a direct flight.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: That's fine,no problem. I will go with other service.

ASSISTANT: Thank you for choosing us.

USER: Anyway thank you for checking.