You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Barbara Carter.

ASSISTANT: How can I aid you?

USER: Can you please help me in flight ticket booking from OAK to SEA to attend a client meeting?

ASSISTANT: Sure, may I know your journey dates?

USER: Thank you and I have planned the trip dates on 04/21 and back on 04/23.

ASSISTANT: There is a connecting flight with fare 100, the number is 100 in airline Delta. Can I book it?

USER: That's perfect, you can book the flight ticket.

ASSISTANT: Your ticket is reserved.

USER: Thank you so much for your quick assistance in my ticket booking.

ASSISTANT: Thank you for reaching us.