You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my reservation, can you help me?

ASSISTANT: Sure, I will do that for you. Could you please tell me your name?

USER: Myself Carolyn Taylor.

ASSISTANT: Taylor, please wait for a moment.

USER: Sure, I will wait for your response.

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

USER: No problem, thanks for checking.

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