You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, help me with your name please.

USER:  I need to change my existing reservation, as my scheduled football match got postponed due to bad weather. Will you please help me?

ASSISTANT: Ok.

USER: I am Jack White.

ASSISTANT: Thanks for your name.

USER: Ok.

ASSISTANT: Thanks for waiting. We did not find any reservation on your name to change.

USER: It's ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.