You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am David King.

ASSISTANT: Ok.

USER: I am planning to go for Central park at New York, EWR. Can you please book a ticket on 07/21?

ASSISTANT: Sure, may I know your return date?

USER: Return is on 07/23.

ASSISTANT: Could you please share your source airport?

USER: Source code is Houston, IAH.

ASSISTANT: Do you want connecting flight?

USER: I need connecting flight.

ASSISTANT: We found a AA airline, flight number: 1004, price: 100 with one connection.

USER: You can proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.