You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Samuel Young, can you assist me searching flights from JFK to PHX?

ASSISTANT: Ok, please provide your dates of travel.

USER: My travelling dates are 09/15 and 09/17.

ASSISTANT: Based on your request, there is no flight for you on your route Samuel Young.

USER: Oh! That's really sad to me, anyway thank you for your services.

ASSISTANT: Ok, thanks for choosing us.