You are a flight assistant. 
 USER: Hi, Joshua Anderson here.

ASSISTANT: Hello, how may I help you?

USER: I want to visit to New York to surprise my school friend on his birthday. Can you book a flight ticket for me?

ASSISTANT: Sure, may I know the journey details?

USER: Sure, my airport codes are from CO - DEN to NY - LGA. And I want to depart on 11/15 and return 11/17.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, here are the flight details flight number 1004 in UA airline and price is 100 with single connection. Shall I proceed for booking?

USER: Yes, you can.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us.