You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to change my recent reservation due to some issues, can you help me in doing that?

ASSISTANT: Sure, may I know your name?

USER: Benjamin Smith here.

ASSISTANT: Thank you. Please wait, let me check your reservation status.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: Ok, no issues. Thank you for the information.

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