You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Debra Martinez.

ASSISTANT: Debra, how may I guide you?

USER: I would like to change my recent reservation, will you help me with that?

ASSISTANT: Sure, i will help you.

USER: Ok.

ASSISTANT: Debra, sorry no reservation are found on your name in our database.

USER: Ok, not an issue.

ASSISTANT: Thank you very much for approaching us.

USER: Thank you for your information.