You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I oblige you today?

USER: I am planning to visit my grand parents home which is located in Chicago, ORD. Can you avail me to book a flight ticket?

ASSISTANT: Sure, when do you want to start and return on?

USER: I want to start on Aug 12 and return on Aug 14.

ASSISTANT: Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer to travel in economy class.

ASSISTANT: Can I know your good name?

USER: Jerry Jones here.

ASSISTANT: Can I know your source code?

USER: I want to start from Boston, BOS.

ASSISTANT: Thank you for your details,we found a connecting flight 1005 in business class which is in American airline. Shall I proceed?

USER: Please make it confirm.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your kind service.

ASSISTANT: Thank you.