You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I provide assistance for you?

USER:  I am Ryan Johnson. I want to travel to DC-IAD to attend a live concert with my friends. Can you book a ticket from CA-OAK?

ASSISTANT: I need your journey dates to book a ticket.

USER: My journey dates are 03/08 and 03/10.

ASSISTANT: For booking a ticket, help me with your price limit.

USER: I can afford up to 200.

ASSISTANT: Thanks for your time. There is a UA airline of price 100 with 1 connection in 1017 flight in your route. Can I make it to confirm?

USER: Ok, you can proceed.

ASSISTANT: Sure, ticket has been booked.

USER:  Thank you for availing me.

ASSISTANT: Thank you for picking us.