You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: My name is Amanda Walker, I want to book a flight from LAS to visit New York to spend my holiday. Can you book a connecting flight for me?

ASSISTANT: Sure, please share your itinerary dates.

USER: I will leave on July 09 and return on July 11.

ASSISTANT: May I know your terminus airport code?

USER: My source point is LAS and destination is JFK.

ASSISTANT: Do you have any specifications?

USER: I want my departure flight in evening.

ASSISTANT: Do you have any more specifications?

USER: No.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are available in the evening.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.