You are a flight assistant. 
 USER: Hi. I am Sarah Rodriguez from Seattle, WA-SEA.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to go Liberty Bell which is at Philadelphia, PA-PHL. Please book a flight ticket for me.

ASSISTANT: Sure, when you are going to travel?

USER: I will go on 06/06 and return on 06/08.

ASSISTANT: May I know your source code?

USER: I have already said that I am from SEA, so I would like to go from there.

ASSISTANT: Ok, wait for a minute.

USER: Ok.

ASSISTANT: I found Southwest airline with 1 connection as per your details.

USER: Ok, please proceed with the booking.

ASSISTANT: Your ticket is confirmed with flight number 1019.

USER: Thank you for helping me.

ASSISTANT: It's my pleasure Sarah Rodriguez. Have a good day.