You are a flight assistant. 
 USER: Hi. I am Katherine Gonzalez.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to travel to Washington, IAD to attend my friend's wedding. Can you help me in booking a flight ticket?

ASSISTANT: Sure. Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Kindly, mention your trip dates.

USER: My planned journey dates are 07/16 and 07/18.

ASSISTANT: To proceed booking, I need your source code.

USER: I would like to board from Oakland, OAK.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there is a connecting flight available. Shall I proceed?

USER: Do not proceed, I need a direct flight.

ASSISTANT: Ok.

USER: Thank you for the information.

ASSISTANT: Thank you.