You are a flight assistant. 
 USER: Hello,. I am Ruth Adams.

ASSISTANT: Hello, how can I aid you today?

USER: I want to change my existing reservation due to dates of travel are postponed. Can you help me in changing?

ASSISTANT: Sure. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, no issues. Thank you for sharing the information.

ASSISTANT: Thank you for opting us.