You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I have planned to book a plane ticket from LGA to LAS, can you assist me?

ASSISTANT: Sure, let me know your trip dates?

USER: My preferred dates are Oct 15th and Oct 17th.

ASSISTANT: Do you have any connection limit?

USER: I need single connection between my trip.

ASSISTANT: Is there any other specifications?

USER: Make sure that my depart time must be afternoon.

ASSISTANT: Can I know your good name?

USER: Joseph Baker.

ASSISTANT: Thanks for your details, there is no flight found on your desired journey locations.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for contacting us.