You are a flight assistant. 
 USER: Hello, I am Jacob White.

ASSISTANT: Hello, how may I serve you today?

USER: Please help me in changing my existing reservation, as my football match got postponed due to heavy rainfall. Please help me in changing?

ASSISTANT: Sure, we are glad to serve you. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, sorry, no reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thank you for your assistance.