You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to attend my friend's wedding anniversary at Philadelphia, please help me in booking a ticket from PHL to PHL.

ASSISTANT: Sure, can I know your travel dates please?

USER: My journey dates are 08/21 and 08/23.

ASSISTANT: Ok, wait a moment please.

USER: Sure, take your time.

ASSISTANT: There is a flight in Southwest airline with price 100, can I book it?

USER: Ok, please book the ticket with the name Karen Johnson.

ASSISTANT: Your ticket has been booked with flight number 1000.

USER: Thank you for your assistance.

ASSISTANT: Thank you for approaching us.