You are a flight assistant. 
 USER: Hi. I am Brian Lopez.

ASSISTANT: Hello, what can I do for you today?

USER: Can you book a flight ticket from Philadelphia, PHL to Oakland, OAK?

ASSISTANT: Sure, may I know when are you travelling?

USER: My travelling dates are from 06/25 to 06/27.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We have a connecting flight from Hawaiian airline, number 1020 and price is 100. Shall I proceed?

USER: Ok, Please proceed.

ASSISTANT: Your seat is booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.