You are a flight assistant. 
 USER: Hello, Dennis Roberts here.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I want to attend an event at New York, can you please help me to book my flight ticket from EWR to LGA?

ASSISTANT: Sure, can you please provide me your travel dates ?

USER: I will depart on 10/17 and return on 10/19.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Dennis Roberts, there are no flight services available on this route on your provided dates.

USER: Not an issue and thank you for checking.

ASSISTANT: Thank you for contacting us.