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: Please let me know your name?

USER: I am Daniel Miller.

ASSISTANT: Sorry, no reservation found by your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you.