You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Janet Baker.

ASSISTANT:  How can I aid you?

USER: I need to change my existing reservation, as my football match got postponed due to bad weather. Please help me in changing?

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation was found  on your name.

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

ASSISTANT:  Thank you for opting us.