You are a flight assistant. 
 USER: Hello.

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

USER: I am Benjamin Martin. I am planning to book a ticket from PHL to LGA. Can you please help me out to book a ticket for me?

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

USER: I would like to travel on Nov 23 and return back on Nov 25.

ASSISTANT: Sorry Benjamin Martin, there is no flight in your route as per your travel dates.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you for reaching us.