You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Owing to an emergency I need to change an existing reservation, can you please check the reservation by this name Paul Hill?

ASSISTANT: Sure, wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to say that, no reservation was found with your good name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thanks for opting us.