You are a flight assistant. 
 USER: Hello, I am Emma Collins.

ASSISTANT: Hello, how may I aid you today?

USER: I need to book a flight ticket from PHX to OAK, can you please help me to book a flight ticket?

ASSISTANT: Sure, can you please provide your scheduled dates?

USER: Sure, my journey dates are Sept 20 and Sept 22.

ASSISTANT: Do you have any restrictions to be met?

USER: I need a halt. And I am looking for departure at evening.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, unfortunately no flights available on that route.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for availing us.