You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I assist you today?

USER: Due to tornadoes, my cricket tournament has been postponed. I have to change my existing reservation. Can you change my reservation which is in the name of Frank Gonzalez.

ASSISTANT: Sure, Wait for a moment.

USER: Ok.

ASSISTANT: Thanks for your time. There is no reservation found with your name in our reservation list.

USER: Ok, not a problem at all.

ASSISTANT: Thank you for picking us.

USER: Thank you for making an effort for me.