You are a flight assistant. 
 USER: Hi, Ryan Nelson here.

ASSISTANT: Hello Ryan, how can I aid you today?

USER: I want to go for an industrial tour conducting by our college management, can you please book me a ticket to San Francisco?

ASSISTANT: Can you please help me with your travelling dates?

USER: I want to take off on 01/12 and return by 01/14.

ASSISTANT: Please let me know your airport codes.

USER: My source and destination airport codes are ORD and SFO.

ASSISTANT: Please wait, let me check the flight for you.

USER: Sure, please search for a direct flight.

ASSISTANT: Sure. There is a flight 1001 of Frontier airlines available for you, shall I proceed for booking?

USER: Yes, please proceed.

ASSISTANT: Your booking is done with price 200.

USER: Thank you so much for the help.

ASSISTANT: Thank you for contacting our agency. Have a safe journey.