You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Deborah Adams. I want to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Sure.

ASSISTANT: Deborah, there is no reservation found under your name.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you for contacting us, have a great day.