Hi.
user
Hello. How can I assist you?
assistant
I would like to change my flight reservation due to some personal issues, can you please help me?
user
Sure, let me know your name to check your reservation details in our database.
assistant
Sure, I am Sarah Taylor.
user
I am sorry to say you that there is no reservation found under your name in our database.
assistant
Sad to hear that, thank you for checking.
user
Thank you for reaching us.
assistant