You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Could you help me in booking a flight ticket from ORD to IAH?

ASSISTANT: Sure, May I know the travelling dates?

USER: My departure day is Jan 14, return day is Jan 16.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Raymond Nelson.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.