Hello.
user
Hello. Can you please let me know how may I guide you?
assistant
I would like to change my existing reservation, due to sudden demise of my grand father. Can you please help me?
user
Sure, I will help you definitely. Can I know the  name with which you have reserved yous ticket previously?
assistant
My name is Brian Baker.
user
Ok Brian Baker, can you please give me a minute?
assistant
Sure, take your own time. Sure, take your own time.
user
I am sad to inform you that, I have not found your past reservation in our database to change the details.
assistant
No problem, thank you for checking.
user
Most welcome. Thank you for reaching us.
assistant