You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Eric Clark. I want to book a flight ticket from OAK to LGA, can you please help me in flight booking?

ASSISTANT: Sure Eric Clark, I am here to help you out. Please provide me your trip dates.

USER: I want to fly on Mar 31, return on Apr 02.

ASSISTANT: Sorry  Eric Clark, there is no flight as per your travel dates.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.