You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I would like to visit Houston, could you please book my flight ticket from EWR to IAH?

ASSISTANT: Sure, May I know the travelling dates?

USER: Thank you. I want to depart on Sept 4th and return back on Sept 6th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight having single connection.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Patrick Miller.

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

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for opting us.