You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Adams.

ASSISTANT: How can I assist you today?

USER: Please book me a ticket from JFK to LAS to meet my family.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I have planned to travel on 08/17 and 08/19.

ASSISTANT: Do you have any specifications?

USER: I need a halt.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: Ok, no problem I will choose anther way to reach my destination. By the way thank you.

ASSISTANT: Welcome, have a great day.