You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I assist you ?

USER: I made a reservation earlier to attend meeting in Houston. Unfortunately meeting shifted to Minneapolis. So I want to change my existing reservation, can you help me out?.

ASSISTANT: Sure, I will help you. May I know your name for further process?

USER: Ryan Lewis is my name.

ASSISTANT: Wait for a while.

USER: OK.

ASSISTANT: Thanks for waiting. Sorry, There is no reservation found with your name.

USER: Ok, no problem at all.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the information.