You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I best aid you today?

USER: I am Patricia Carter. I want to book a flight ticket from NY-LGA to NV-LAS. Can you help me?

ASSISTANT: Sure, I can help you in that booking. Please assisgn me your journey dates?

USER: 08/12 and 08/14 are my travelling dates.

ASSISTANT: Do you need any restrictions in connection?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say that, there is no flight available on your journey dates.

USER: No issue. Thank you.

ASSISTANT: Thanks for connecting with us, we hope to assist you again.