Hello.
Hello. How may I guide you?
I want to attend my friend's marriage for that I reserved the ticket, but right now I am going by with other friends. So that I want change my reservation, can you help me to change my ticket?
Sure, I can help you with that. Can you please provide your name?
I am Andrew Johnson.
Sorry Andrew, there is no reservation found.
It's ok. Thanks for your helping.
Thank you, have a nice day.