You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Williams.

ASSISTANT: How can I respond to your request?

USER: Can you help me to book a flight ticket from DEN to LAX?

ASSISTANT: I understand your request, we are happy to help you. Please let me know if you need a connecting flight.

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your planned travelling dates to proceed further?

USER: My travelling dates are 11/24 and 11/26.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: That's ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.