You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicole Garcia.

ASSISTANT: Nicole Garcia, how may I assist you today?

USER: I am planning to change an exiting reservation, due to health issue. Can you please help me out?

ASSISTANT: I am sorry to hear that, I will help you. Please help me a minute.

USER: Sure.

ASSISTANT: Nicole Garcia, I regret to inform you that there is no reservation done on your name.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us. I pray for your speedy recovery.