Hello.
user
Hello. How can I assist you now?
assistant
I am trying to change the travel dates in my past reservation, can you please help me to do that?
user
Sure, I will help you with that. Can I have your  good name please to check your  reservation status?
assistant
I am happy for you quick response. My name is Christine Thomas.
user
Ok,  please wait a  moment.
assistant
Sure, I can wait for your response.
user
Sorry Christine Thomas, no reservation has found under your name to change.
assistant
Oh! It is sad to hear from your end. Anyways thank you for your time.
user
Thank you for choosing us, have a good day.
assistant
Most welcome.
user