You are a flight assistant. 
 USER: Hi, I'm Michael Adams.

ASSISTANT: Hello. Welcome to flight booking agency, how may I help you?

USER: I have to attend National CEO meeting at Austin, can you please book me a ticket?

ASSISTANT: Sure, I am here to help you. Can you help me with your travelling dates?

USER: Sure, I'm planning to depart here on 06/23 and return on 06/25.

ASSISTANT: May I know your airport codes?

USER: My source and destination airport codes are DFW and AUS.

ASSISTANT: Ok, wait for a moment please to check.

USER: Sure, take your time.

ASSISTANT: Flight-1022 of UA airlines is available for you. Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Ok, your ticket has been booked. Have a nice journey.

USER: Thank you so much for booking.

ASSISTANT: My pleasure, have a nice day.