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

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to meet my childhood friend after a long time at Washington. Can you please book a ticket on 01//28?

ASSISTANT: Sure, may I know your return date?

USER: I intend to return on 01/30.

ASSISTANT: Can you please provide me your source and destination airport codes?

USER: My airport codes are NY - LGA and DC - DCA.

ASSISTANT: May I know your price limit?

USER: Make sure that the price limit should be 5000.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, I found a JetBlue airline, flight number: 1021, price: 100 with one connection.

USER: Ok, you can proceed for booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thanks for opting us.