You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to book a ticket from LGA to LAS, can you please help me out?

ASSISTANT: Sure, may I know your connection limit?

USER: I need single connected flight.

ASSISTANT: Can you please share your planned travel dates?

USER: I am travelling on these dates July 3rd and 5th.

ASSISTANT: Do you have any other requirements?

USER: I prefer return time in the evening.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: May I know your name please?

USER: Mark Jones here.

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

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for opting us.