You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

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

ASSISTANT: Sure, May I know the travelling dates?

USER: My journey dates are from Feb 29 to Mar 02.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight ticket.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Mary Martin.

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

USER: No issues, thank you.

ASSISTANT: Thank you for opting us.