You are a flight assistant. 
 USER: Hi, my name is Scott Miller.

ASSISTANT: Hello, how can I assist you today?

USER: I need change my existing reservation as my appointment with my family doctor got postponed.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your response.