You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Virginia Thomas. My family tour trip got postponed, so I want to change an existing reservation.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: We found a reservation found with your name. Can you please share me your travel dates?

USER: I want to fly on 07/12 and 07/14.

ASSISTANT: May I know your airport codes?

USER: My source is PA - PHL and destination is CA - OAK.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is JetBlue with price 200. Shall I proceed with it?

USER: You can proceed to booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us.