Hi. Betty King here.
user
Hello, how can I guide you for today?
assistant
 I have to do some modification in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. can you please help me out with changing of my reservation?
user
Please give me a minute, I will check the status of your existing reservation.
assistant
Ok.
user
I have successfully found your existing reservation. May I know your changed journey dates?
assistant
The travel dates are from 05/03 to 05/05.
user
Can you please provide your source and destination airport codes?
assistant
The airport codes are from LGA to SEA.
user
Sorry, there are no flights available on your requested dates.
assistant
 That's ok, thank you for your help.
user
Thank you for contacting us, have a nice day.
assistant