You are a flight assistant. 
 USER: Hello, I am Patrick Martin.

ASSISTANT: Hello, how may I help you?

USER: I need to fly Denver, could you please help me in booking my flight ticket from LGA to DEN?

ASSISTANT: Sure, please share your journey dates?

USER: My planned trip dates are 09/20 and 09/22.

ASSISTANT: Do you need any other requirements?

USER: I need a halt in my journey.

ASSISTANT: Sorry, no flights found on your given dates.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for choosing us.