You are a flight assistant. 
 USER: Hello,. I am Ashley Walker.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me in booking a flight ticket from JFK to LAS?

ASSISTANT: Please share me your planned travel dates.

USER: I want to travel on 10/20, and need to return on 10/22.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the evening time.

ASSISTANT: Is there any class preference for you?

USER: I prefer for business class.

ASSISTANT: Please wait for a moment.

USER: Make sure, I need a single connection.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the information.