You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: I am Carolyn Walker. I am planning to book a ticket from LAS to JFK. Can you please help me out?

ASSISTANT: Yes, I am here to help you about that. Can you please help me with your planned dates of journey?

USER: I would like to travel on 01/15 and return back on 01/17.

ASSISTANT: Sorry Walker, I am unable to find a flight which can travel your preferable route.

USER: That's fine. Thank you for your service.

ASSISTANT: My pleasure, thank you for reaching out here.