You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book the ticket from IAD to OAK? As I'm planning to visit Oakland hills.

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: Sure, my planned departure and return travel dates are 21st and 23rd of Feb.

ASSISTANT: Ok, please mention your name.

USER: My name is Mary Rodriguez.

ASSISTANT: Let me know your connection limit.

USER: I prefer single connected flight.

ASSISTANT: Do you have any specification?

USER: I don't have any other specifications.

ASSISTANT: Here, I found a flight for you with 1 stopover in economy class and it costs you 100. Can I proceed?

USER: That's fine for me, you can proceed for booking.

ASSISTANT: Your booking is done with flight 1001 in Delta airlines.

USER: Thank you so much for your help.

ASSISTANT: Thank your reaching us, have a safe flight.