You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Joshua Moore, want to travel from LGA to PHL. Please help me in booking my ticket.

ASSISTANT: Sure, on which dates you are want to travel?

USER: Sure, my trip dates are from 08/02 to 08/04.

ASSISTANT: Sorry, there is no flights available.

USER: It's ok, thank you.

ASSISTANT: Most welcome.