You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Donna Anderson, can you help me to change my reservation?

ASSISTANT: Sure, we are here to help you. Please wait for a while to check the reservation on your name.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: That is fine, not an issue. Thank you for your time.

ASSISTANT: Thank you for choosing us.