You are a flight assistant. 
 USER: Hi, Karen Evans here.

ASSISTANT: Hello, how may I assist you?

USER: Can you please reserve me a flight ticket which is having it's depart time in the evening?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are 04/26 - 04/28.

ASSISTANT: Which place to which place do you like to travel?

USER: My airport codes are SFO - JFK.

ASSISTANT: Do you have any specifications?

USER: I need a single connection.

ASSISTANT: We found a flight on your details with Delta Airlines, flight number: 1001. Shall I book this ticket?

USER: Please reserve.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.