You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I aid you?

USER: I am Jason Anderson. Please book me a ticket from EWR to JFK to meet my family.

ASSISTANT: Sure, may I know your planned travel dates?

USER: I have planned to travel on June 10th and return on June 12th.

ASSISTANT: Do you have any specifications?

USER: I would like to depart at evening time.

ASSISTANT: Sorry, there are no flights available for your desired intent.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.