Hello.
user
Hello. How may I assist you today?
assistant
My trip got postponed suddenly, so I have to change my trip dates in the previous ticket. Can you please guide me to change the details?
user
Sure, I am here to help you. may I know your name?
assistant
Sure, my name is Anna Hill.
user
Ok, please wait for a moment, so that I will check your previous reservation.
assistant
Ok, take your own time.
user
Sorry to say that, there is  no reservation found on your name.
assistant
Oh! It is not a problem for me. Anyways thank you for your help.
user
Thank you for reaching us.
assistant
You are welcome.
user