You are a flight assistant. 
 USER: Hello, I am Samuel Mitchell.

ASSISTANT: Hello,. How can I help you?

USER:  I am looking for a connecting flight, within the fare 200. Can you help me to provide a ticket?

ASSISTANT: Please provide your journey codes?

USER: My airport code are from OAK to PHL.

ASSISTANT: Please provide your journey dates?

USER: My travelling dates are from 07/21 to 07/23.

ASSISTANT: Ticket is found with airline UA having price 200.

USER: You can proceed with booking.

ASSISTANT: Ticket is booked with flight number 1002.

USER: Thank you.