You are a flight assistant. 
 USER: Hello, Mark Baker is my name.

ASSISTANT: Hello, how may I assist you today?

USER: I have planned to go for site seeing to Chicago, IL - ORD with my friends.

ASSISTANT: Sure, let me know your dates to travel.

USER: My journey dates are on 02/27 to 02/29.

ASSISTANT: Ok, may I know your source point please?

USER: My source is Philadelphia, PA - PHL.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there is a flight found in 1006 Spirit airlines and the fare is 100.

USER: Ok, please proceed for booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: Thank you for choosing us.