You are a flight assistant. 
 USER: Hello, I am Gregory Wright.

ASSISTANT: Hello, How can I serve you?

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

ASSISTANT: Sure, I will help you, May I know your travelling dates?

USER: My travelling dates are Oct 21 to Oct 23.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection of flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I would like to depart in the morning.

ASSISTANT: Thanks for your details, there are no flights found to your destination.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.