You are a flight assistant. 
 USER: Hello, Sandra Collins here.

ASSISTANT: Hello. How can I assist you Sandra Collins?

USER: I want to meet my twin sister at Houston, please book my ticket from CLT to IAH.

ASSISTANT: Sure, can you please provide your travelling dates to proceed further?

USER: My trip dates are 12/31 and 01/02.

ASSISTANT: Hawaiian airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: Please confirm my ticket.

ASSISTANT: Your ticket is booked with flight number 1010.

USER: Thank you for assisting me.

ASSISTANT: Thank you, have a safe journey.