You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Sandra Thomas. I want to book a flight ticket from Oakland OAK to SEA. Can you find a flight ticket for me?

ASSISTANT: Sure, please share your journey dates?

USER: Sure, my preferable dates are on June 24 and return on June 26.

ASSISTANT: Are you looking for any preferred connections?

USER: Yes, I need a single connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: And, I want to depart in the evening time.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, not an problem. Thank you for your valuable time.

ASSISTANT: Thank you for choosing us.