You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Michelle Clark. I want to visit Oakland to meet my brother, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you for booking. Can you please provide me your travelling dates?

USER: I would like to start my journey on 07/03 and my return will be on 07/05.

ASSISTANT: Ok, may I know your airport codes?

USER: My airport codes are from IAD to OAK.

ASSISTANT: There is one flight is available for you with single connection. Shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket is booked with flight number 1021 and airline is Spirit.

USER: Thank you for booking.

ASSISTANT: Welcome. Thank you for choosing us.