You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket to meet my childhood friend at DEN, can you help me with booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are May 13 and May 15.

ASSISTANT: Can you please share your boarding point?

USER: My boarding point is LAX.

ASSISTANT: Do you want connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: My return time is morning.

ASSISTANT: May I know your name please?

USER: I am Williams Roberts.

ASSISTANT: Sorry, there are no flights found with your given details.

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

ASSISTANT: Thank you for opting us.