Hi.
Hello. How may I help you?
I am Jessica Collins, in my previous reservation I gave wrong airport codes, so can you help me for changing my existing reservation?
 Sure, please wait a moment.
Ok, I will wait for your reply.
Collins, no reservation has been found on your name.
Oh! It's ok, I think my sister's already changed my reservation. Thank you for your quick response.
Thank you for approaching us.