You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christine Evans.

ASSISTANT: How can I assist you?

USER: Can you please help me in changing my existing reservation, as my football match got postponed to some other date.

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Ok.

ASSISTANT: Christine Evans, there is no reservation found active under your name to do modifications in that.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us, have a nice day.