You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I need to book a flight ticket from IAH to ORD, Can you please help me for booking?

ASSISTANT: Can you share your trip dates?

USER: I would like to travel on 12/13 to return on 12/15.

ASSISTANT: Do you have any connection limit?

USER: I am comfortable with stop over.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: Yes, I need a economy class.

ASSISTANT: May I know your name?

USER: Daniel Rodriguez.

ASSISTANT: Sorry to say that, we didn't found any flights with your details.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.