You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Owing to an emergency, I want to change my existing reservation.

ASSISTANT: Sure, I am here to help you to change it. Can I have your good name please?

USER: Sure, Cynthia Adams here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name to change it.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.