You are a flight assistant. 
 USER: Hello, I am Raymond Turner.

ASSISTANT: Hello. How can I help you?

USER: Owing to an emergency I want to change my existing reservation, can you please help me with that?

ASSISTANT: Sure, give me a minute.

USER: Sure.

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

USER: Ok, no issues, thanks for your information.

ASSISTANT: Thank you for reaching us.

USER: Thank you.