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

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, can you please share your departure and arrival dates?

USER: My journey dates are Aug 20 and Aug 22.

ASSISTANT: Do you have any restrictions to be met?

USER: I need a halt.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: No problem, thank you for your information.

ASSISTANT: Thank you for availing us.