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

ASSISTANT: Hello. How can I help you?

USER: I have to attend my brother's convocation ceremony, so please book my ticket from IAD to OAK.

ASSISTANT: Please share your travel dates?

USER: My itinerary dates are 12/02 and 12/04.

ASSISTANT: Flight-1013 with connection limit 1 and fare 100 is available, shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us.