You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Edward Hernandez. Owing to an emergency, I want to change an existing reservation.

ASSISTANT: Sure, can you help me with your name? Thank you for your details. Please wait a moment I will check and let you know.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.