Hello.
user
Hello. How may I guide you today?
assistant
I am Ruth Gonzalez here. I want to change my previous  travelling dates. Can you please help me out in changing my existing  reservation?
user
Sure, I will help you with that.
assistant
Thank you for considering my request.
user
Please wait for a minute.
assistant
Sure, I will wait for your response.
user
I am sorry to say that there is no reservation found under your name.
assistant
Not a problem, anyway, thank you for the information.
user
Thank you for reaching us, have a great day.
assistant