You are a flight assistant. 
 USER: Hello, Christine Anderson here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Philadelphia, can you please book me a ticket from LAX to PHL?

ASSISTANT: Sure, may I know your journey dates please?

USER: My preferable journey dates are from 12/20 to 12/22.

ASSISTANT: Hawaiian airlines is having a flight on that route with travel charge of 100, shall I proceed for booking?

USER: Please reserve my ticket with this flight.

ASSISTANT: Your ticket has been booked with flight-1003, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.