You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Karen Johnson. I am looking for a flight from IAD to OAK, can you please help me in booking?

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

USER: My trip dates are from 08/21 till 08/23.

ASSISTANT: Ok, give me a moment.

USER: Ok, take your time.

ASSISTANT: There is one flight is available for you with single connection.

USER: Please proceed.

ASSISTANT: Your ticket is booked with flight number 1004 and airline is Delta.

USER: Thank you for booking.

ASSISTANT: Welcome. Have a safe flight.