You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Daniel Green, want to travel from EWR to LGA.

ASSISTANT: May I know your trip dates?

USER: My travel dates are from 03/22 to 03/24.

ASSISTANT: Sorry, there is no flight available.

USER: It's ok, thank you.

ASSISTANT: Welcome.