You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Sandra Phillips. I am planning to attend my sister's wedding anniversary in EWR, can you please book a flight ticket from LAX?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My trip dates are from 04/05 till 04/07.

ASSISTANT: Please allow me a moment to check the flight availability.

USER: Ok, take your time.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.