You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Myself Jacob Thomas. I need to schedule my trip to New York for next week. Please book flight ticket from PHL to LGA.

ASSISTANT: Ok, can you please provide me your travelling dates?

USER: Sure, I have to start in 01/19 and arrival on 01/21.

ASSISTANT: Sorry, there is no flight available for your request.

USER: Thank you for the information.