You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Brandon Parker. Owing to an emergency, I would like to change my existing reservation. Can you help me?

ASSISTANT: Sure Parker, please wait a moment.

USER: Ok.

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

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: Thank you for approaching us.