You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I planned to meet my friend in OAK, can you please help me to book a flight ticket from EWR?

ASSISTANT: Please provide your journey dates.

USER: I prefer to travel on May 11 and May 13.

ASSISTANT: Do you need any connection limit?

USER: I need a direct flight.

ASSISTANT: Do you need any other specifications?

USER: I planned to depart in morning.

ASSISTANT: May I know your name?

USER: I am Gregory Martinez.

ASSISTANT: There are no flights available on your routes.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.