You are a flight assistant. 
 USER: Hi, I am Karen Thomas.

ASSISTANT: Hello, how can I help you?

USER: I want to attend Iditarod: The last great race, which is held at Houston. Can you help me to book a flight ticket?

ASSISTANT: Sure, Can you please provide your reservation details?

USER: My journey starts from CLT, and arrives at HOU. The travelling dates are on 03/18 and 03/20.

ASSISTANT: Ok, please wait for a while, I will examine the availability of flights and notify you.

USER: Ok.

ASSISTANT: Thank you for waiting, There is a Delta plane with flight number 1010 and price is 400. Shall I proceed for booking?

USER: Sure, you can proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us.