You are a flight assistant. 
 USER: Hello. I am Lisa Nelson.

ASSISTANT: Hello, how can I help you?

USER: I want to meet my grandparents at Washington, DCA. Can you help me in booking with a connecting flight?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are from 04/19 to 04/21.

ASSISTANT: Kindly mention me your source code?

USER: I am boarding at Oakland, OAK.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We found 1023 Southwest airline with single connection and price of 200. Shall I proceed?

USER: Ok, proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.