You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am searching to book a flight ticket but I don't find it.Can you help me about it?

ASSISTANT: Sure, will you provide your travelling details?

USER: I am Mark Smith.My travelling dates are 12/14 and 12/16.

ASSISTANT: Will you provide your airport codes?

USER: I would like to travel from TX - AUS to CA - OAK.

ASSISTANT: As per your request, there is a flight with price 100 and the connections 1. Shall I proceed for booking?

USER: Ok, please book it for me.

ASSISTANT: Your ticket is booked.The flight number is 1019.

USER: That's good.Thank you for your services.

ASSISTANT: Welcome, have a great day.