You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I will help you. For checking your reservation status, may I know your name?

USER: Thank you. I am Deborah Perez.

ASSISTANT: Sorry Perez, I did not find any reservation under your name in our database.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: You are welcome and thank you for reaching us.