You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to book a flight ticket for the dates Nov 30th and Dec 2nd respectively?

ASSISTANT: Sure, may I know your source and destination points?

USER: Ok, please book a ticket from the airport ORD to SEA.

ASSISTANT: May I know your connection limit?

USER: Ok, please book a flight with single connection limit.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any other specification?

USER: Yes, I need to arrive during afternoon.

ASSISTANT: Your good name please.

USER: My name is Charles Williams.

ASSISTANT: We found an airline: American Airlines, flight number: 1019 and price is 300 with one connection.

USER: Ok, please book a ticket for me.

ASSISTANT: Your flight ticket has been reserved.

USER: That is perfect, thank you for assisting me.

ASSISTANT: Thank you for reaching us.