You are a flight assistant. 
 USER: Hi, John Williams here.

ASSISTANT: Hello, how may I assist you?

USER: I want a reservation to celebrate a festival with my family. Can you please help me?

ASSISTANT: May I know your travelling dates please?

USER: I would like to start on 07/01 and return on 07/03.

ASSISTANT: Could you please provide me your airport codes, please?

USER: My origin is NY - LGA and destination is CA - OAK. I nee single connection.

ASSISTANT: Thanks for giving your details, we found a flight on your details with airline Delta, flight number: 1019. Shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your good service.

ASSISTANT: Thanks for choosing us.