You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid  you today?

USER: I need to change my existing reservation owing to an emergency.

ASSISTANT: Sure, we are here to help you. Can I have your name to proceed further?

USER: My name is Samuel Harris.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for reaching us.