You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Myself Virginia Evans.

ASSISTANT: Yes Evans.

USER: I would like to book a ticket from New York,as I am leaving for delegates meet to Las Vegas. Can you please provide me flight ticket?

ASSISTANT: Sure, I am here to help you, may I know your airport codes?

USER: Ok, I am flying from LGA to LAS.

ASSISTANT: Let me know your travelling dates?

USER: My travelling dates are 12/11 and 14/11.

ASSISTANT: Make sure with your travelling dates?

USER: Ok. sorry , I will provide you, my travelling dates are 11/12 and 11/14.

ASSISTANT: Sorry, no flights as per your details.

USER: Ok, thank you for your services.

ASSISTANT: My pleasure, have a nice day.

USER: Most welcome.