You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is John White, I want to book a flight from LAX to PHX. Can you book a flight for me?

ASSISTANT: Sure, can you share your travel dates please?

USER: I will travel on DEC 29 and return on Dec 31.

ASSISTANT: Sorry, there is no flight services available on your required routes.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.