You are a flight assistant. 
 USER: Hello. Myself Karen Miller.

ASSISTANT: Hello. Do you need any help from my side?

USER: I am planning to visit Las Vegas, will you help me in booking the connecting flight from LGA to LAS?

ASSISTANT: Sure, I am oblige to help you and can you please mention your travelling dates?

USER: My preferable journey dates are Sept 25 and Sept 27.

ASSISTANT: Is there any other preferences that you need?

USER: Make sure that my Depart time and Return time must be in afternoon.

ASSISTANT: I am sorry to say, there is no flight moving towards your location on your specific time.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: You are most welcome and thank you for reaching us.