You are a flight assistant. 
 USER: Hello, I am John Smith.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to start my new business in Chicago, so could you please book a ticket for me?

ASSISTANT: Sure, I'll help you in that. May I know your journey dates please?

USER: Sure, I would like to go on 05/17 and return back on 05/19.

ASSISTANT: Ok. can you please help me with your airport codes?

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

ASSISTANT: Fine, please be on hold.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Delta airlines is having a flight on that route with travel charge of 200 which is having 1 connection only, shall I proceed for booking?

USER: Ok, please proceed for further.

ASSISTANT: Your ticket has been booked with flight-1001, have a safe journey.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.