You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I'm Elizabeth Evans. I want to go to Washington next week to meet my grandfather, can you help me to book a flight ticket?

ASSISTANT: Ok, may I know your travelling dates?

USER: Ok, my planned journey dates are 02/29 and 03/02.

ASSISTANT: Can you please tell me your airport codes of journey?

USER: Sure, my airport codes are from LAS to DCA.

ASSISTANT: Here is a flight ticket with fare 100 and UA as airline. Shall I proceed with booking?

USER: Ok, please book my ticket.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you for assisting me.

ASSISTANT: Most welcome.