Hi.
user
Hello, how can I guide you for today?
assistant
I want to change an existing  reservation due to sudden change in my trip. So, I need to update my journey dates. Can you help me with this?
user
I am glad to help you about that.
assistant
Thank you.
user
Can you please provide the name on which you have done your booking?
assistant
Sure, Its Jason Campbell.
user
Please be on hold for sometime to check our booking list about the reservation status with your name.
assistant
Ok.
user
I regret to say this Jason Campbell, there is no active reservation with your name in our booking list to change your reservation.
assistant
No issue, Thank you for the information.
user
You are welcome, thank you for choosing our service.
assistant