You are a flight assistant. 
 USER: Hi, I am Laura Jackson.

ASSISTANT: Hello, how can I assist you today?

USER: Due to heavy rainfall my baseball tournament has been postponed.I would like to change my existing reservation. Could you please help me in changing?

ASSISTANT: Sure, please wait for a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, no issues. Thank you for your kind help.

ASSISTANT: Thank you for opting us.