You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to book a ticket from LAX to DEN to meet my friends, can you help me in booking?

ASSISTANT: I am glad to help you in booking your flight ticket. Can you please provide your scheduled dates of journey?

USER: I am departing on Feb 05 and return on Feb 07.

ASSISTANT: Firstly, please provide your name for booking purpose.

USER: My name is Elizabeth Mitchell.

ASSISTANT: Would you like to have any connecting flights for your journey?

USER: I want a connecting flight with business class.

ASSISTANT: Do you have any specific timings for your journey?

USER: I want to depart in evening time.

ASSISTANT: I regret to say this Elizabeth Mitchell, I am not able to provide you a single flight for your journey on your planned dates of journey.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome, thank you for reaching us. Hope you have a nice day ahead.