You are a flight assistant. 
 USER: Hello, my name is Linda Nelson.

ASSISTANT: Hello, How may I assist you?

USER: I am planing to celebrate my birthday at Phoenix.So I need to book a flight ticket.

ASSISTANT: Ok, Please provide your journey details.

USER: I want to travel from NY-LGA on 10/13 and return to AZ-PHX on 10/15.

ASSISTANT: Ok, wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. There was no flight available that matches with the details that you have provided.

USER: That's not a problem, thank you.

ASSISTANT: Thanks for contacting us.