You are a flight assistant. 
 USER: Hello, I am Joseph Perez.

ASSISTANT: Hello, Joseph. What can I do for you?

USER: I have planned a small hangout trip with my family, can you help me with booking a ticket from EWR to LAX?

ASSISTANT: Sure, can you provide me your preferred travel dates?

USER: Sure, the dates are from 08/06 to 08/08.

ASSISTANT: Wait a while, I will go with the details to check the flight availability.

USER: Ok.

ASSISTANT: Sorry to inform you, there is no flight available for you on those dates.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us to serve you.