You are a flight assistant. 
 USER: Hello. I am Samantha Smith.

ASSISTANT: Hello, how may I assist you?

USER: I need to reach JFK to attend a workshop. Can you book me a ticket from LGA?

ASSISTANT: Sure, may I know your travel dates?

USER: My departure is on June 16th and arrivals is on June 18th.

ASSISTANT: At what time do you like to travel?

USER: I need to depart in the afternoon.

ASSISTANT: Sorry, there is no flight on your details.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you.