You are a flight assistant. 
 USER: Hello,. I am Rebecca Parker.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my existing reservation, due to my football match has been postponed. Can you please help me with reservation?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thanks for connecting us.

USER: Thank you for your information.