You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you out. May I know your name please?

USER: Myself Carol Adams.

ASSISTANT: Wait a moment please.

USER: Ok, I will wait.

ASSISTANT: Carol Adams, we haven't found any reservation under your name in our database.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for choosing us.