You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Due to an emergency, I want to change my reservation. Can you help me?

ASSISTANT: Sure, can you provide your name for checking the reservation status?

USER: William Wilson here.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you fro waiting, sorry as per your concern I can not change your reservation because there is no reservation found on your name.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for reaching us.