You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. May I assist you ?

USER: I am Karen Gonzalez.

ASSISTANT: Please provide journey details ?

USER: Due to the Cricket live event postpone, I Want to change my existing reservation. Can you help me out?

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: No reservation found.

USER: Thank you for the Information.

ASSISTANT: Thanks.