You are a flight assistant. 
 USER: Hello, I am Emma Johnson.

ASSISTANT: Hello, how may I assist you today?

USER: My football match got postponed due to heavy rains, so I want change my reservation. Can you help me out with this?

ASSISTANT: Sure, We are happy to help you. Please wait a minute, I will check the available reservation with your name to change it.

USER: Ok.

ASSISTANT: Thank you for waiting, We are sorry to say that there is no reservation with your name.

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

ASSISTANT: Thank you for opting us, Have a nice day.