You are a flight assistant. 
 USER: Hello, I am Carolyn Williams.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to visit NASA space center, can you please book me a ticket?

ASSISTANT: Sure, may I know your planned journey dates?

USER: My journey dates are from 08/21 to 08/23.

ASSISTANT: Could you please provide me your source and destination?

USER: Sure, my source is ATL and destination is IAH.

ASSISTANT: May I know your price limit?

USER: My price limit is up to 5000.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, I found a Delta airline with one connection.

USER: May I know the flight number?

ASSISTANT: Flight number: 1013, price is 200.

USER: Ok, please book this ticket.

ASSISTANT: Ok, your flight ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.