You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicole Harris.

ASSISTANT: How can I assist you Harris?

USER: Due to change in my plans to visit Dallas, I would like to change my existing reservation. Can you help me with this?

ASSISTANT: Sure, I'll help you with that. Please be on hold.

USER: Sure, I will wait for your response.

ASSISTANT: I found your reservation, please provide your airport codes.

USER: Sure, my nearest airport codes of travel are from LAX to AUS.

ASSISTANT: May I know your travel dates please?

USER: My planned dates of journey are from 06/08 to 06/10.

ASSISTANT: Delta airlines is having a flight with travel charge of 100, shall I proceed for booking?

USER: That's ok for me. Please reserve my ticket with this flight.

ASSISTANT: I have successfully booked your ticket with flight-1008, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.