You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Scott Baker. Due to my health problem I want to change my existing reservation, can you please help me to change my reservation?

ASSISTANT: Sure, give me a minute.

USER: Sure.

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

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.