You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: As my meeting got postponed at Austin, could you please help me in altering my existing reservation?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: My previous reservation has done with the name Thomas Hernandez.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: I found your reservation in our database, can you please provide your new travel dates?

USER: My preferable journey dates are from 08/15 to 08/17.

ASSISTANT: Can you please provide me your respective airport codes?

USER: My nearest airport codes of journey are from LGA to AUS.

ASSISTANT: UA airlines is having a flight on that route with travel charge of 200, shall I proceed for booking?

USER: Please book my ticket with this airlines.

ASSISTANT: I have successfully booked your ticket with flight-1014, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.