You are a flight assistant. 
 USER: Hello, I am Barbara Davis.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I would like to visit downtown aquarium at Denver, DEN.

ASSISTANT: Ok.

USER: Can you help me in booking a flight ticket with fare 200?

ASSISTANT: Sure. Do you prefer direct flight or connecting flight?

USER: I prefer to travel with connecting flight only.

ASSISTANT: Help me with your trip dates.

USER: I will start on 03/25 and return on 03/27.

ASSISTANT: To proceed booking I need your source code.

USER: My source point is New York, LGA.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: There is a flight with airline: UA, flight number:1012, price 100, 1 connection. Shall I proceed?

USER: Please, proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you, have a safe journey.