You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I am Shirley King want to visit JFK, can you book a ticket from LAS?

ASSISTANT: Sure, please mention your preferable dates.

USER: Sure, my travelling dates will be 07/23 and 07/25.

ASSISTANT: Just give a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to say this, no flights are available on your desired route.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.