You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Richard Nelson, Owing an emergence I want to change my existing reservation. Can you help me with it?

ASSISTANT: Sure. May I know your name? Ok, Wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thanks for the help.