You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Anna Hernandez.

ASSISTANT: Anna Hernandez, how can I aid you today?

USER: I need to book a flight ticket from JFK to LAS. Please help me to book a flight ticket.

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My journey dates are from May, 04 to May, 06.

ASSISTANT: Ok, do you have any requirements?

USER: I need to return in the evening and I need a single connecting flight.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure.

ASSISTANT: Sorry Anna Hernandez, there are no flights available on your requested dates.

USER: Nothing to worry, thanks for your information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.