You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: George Martin here. I want to change my existing reservation due to my health, will you help me?

ASSISTANT: Georgia Martin, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your response.