You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Owing to an emergency, I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your good name to check the reservation status?

USER: Yes, I am Samantha Smith.

ASSISTANT: Please, wait for a while.

USER: Ok, I will.

ASSISTANT: Thank you for waiting, there is no reservation found on your  name to change.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for approaching us.