You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Nancy Mitchell. I want to book a ticket from OAK to PHL to attend friend's birthday, can you help me in booking?

ASSISTANT: Sure Nancy, Will you please share me your travelling dates?

USER: I am departing on Sep 20 and return on 22 Sep.

ASSISTANT: Is there any class preference?

USER: I am ok with any class.

ASSISTANT: May I know your departure and arrival dates?

USER: I want to return in evening time. I have mentioned my travel dates above.

ASSISTANT: Sorry, may I know your connection limit?

USER: I need a flight with 1 connection limit.

ASSISTANT: Ok, Is there any other specifications?

USER: I do not have any other specifications?

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: We found a United Airline flight in the economy class with connecting flight fare 100 which returns at 22:00 PM, can I proceed for booking?

USER: Please proceed for booking.

ASSISTANT: Your ticket has been booked with flight number 1008.

USER: Thank you for your help.

ASSISTANT: Thank you.