You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Can you please aid me in making an airline reservation from SFO to SEA?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My travelling dates are May 21st and May 23rd.

ASSISTANT: May I know your name to proceed further?

USER: Paul Brown.

ASSISTANT: Do you need any connections between your trip?

USER: I need a direct flight.

ASSISTANT: Do you need any other requirements?

USER: I will prefer to travel in normal-cost airline.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for contacting us.