Hello.
user
Hello, how can I assist you now?
assistant
Can you please help me to modify my travel dates in the previous reservation?
user
Sure, I am  happy to help you with that. Can I have your  good name please to check your reservation status?
assistant
Thanks a lot for your response. My name is Frank Harris.
user
Ok,  please wait a moment.
assistant
Ok, take your own time and provide me the information about the past ticket.
user
Sorry Frank Harris, no reservation has found under your name to change.
assistant
That's not a problem for me, thanks a lot for spending your time.
user
Thank you for choosing us, have a good day.
assistant