You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ryan Walker here.

ASSISTANT: Ryan, how may I help you?

USER: I will be visiting to New York EWR this August, can you please book a flight reservation from PHL?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My travelling dates for this journey will be from 08/25 to 08/27.

ASSISTANT: Please hold on for a moment. Sorry Walker, no flight is available on your route.

USER: Ok, no problem. Thank you for checking anyways.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.