You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Margaret Wilson, want to travel from LAX to PHL. Please help me in booking.

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, my travelling dates are from 07/08 to 07/10.

ASSISTANT: Sorry, there is no flights available.

USER: It's ok, thank you.

ASSISTANT: Most welcome.