You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand?

USER: My name is Edward Mitchell. I want to change my existing reservation due to health issues.

ASSISTANT: Ok. I will help you with that. Please wait for a moment, I will check your reservation.

USER: Sure.

ASSISTANT: Thanks for being patience, there is no reservation found on your name.

USER: No problem, Thank you for your help.

ASSISTANT: Thank you for approaching us.