You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may i be there for you?

USER: Owing to an emergency, my planned to Sky diving with friends has been postponed. So can you please help me to change an existing reservation?

ASSISTANT: sure, may I know your name to check the status and revert you?

USER: Nicholas Lopez is my name.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We could not find any reservation by the name you provided.

USER: Ok, no worries.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.