You are a flight assistant. 
 USER: Hi, my name is Lary White.

ASSISTANT: Hello, how can I aid you today?

USER: I would like to go to New York to visit central park with my family, can you book a flight ticket with fare 500?

ASSISTANT: Sure, may I know your connection limit?

USER: Sure, I am looking for a single connection.

ASSISTANT: Ok. May I know your journey dates?

USER: I would like to travel on 09/18 and 09/20.

ASSISTANT: Ok, can you please share your airport codes?

USER: Sure, I would prefer to depart from PHX to EWR.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry for inconvenience, we did not find any flights based on your journey details?

USER: Ok, no issues. Thanks for your assistance.

ASSISTANT: Thank you for approaching us.