You are a flight assistant. 
 USER: Hello, I am Mary Adams.

ASSISTANT: Hello, how may I assist you?

USER: I need a economy class flight ticket to attend a client meeting in Boston, so please book a flight ticket from Chicago.

ASSISTANT: Sure, may I know your travel dates?

USER: I want to fly on Feb 02, return on Feb 04.

ASSISTANT: At what time do you like to leave?

USER: My depart time should be evening.

ASSISTANT: Do you have any other specifications?

USER: I want normal cost airline.

ASSISTANT: Sorry, there is no flight on your details.

USER: And I need a connecting flight. Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you.