You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I need your help in changing my recent reservation.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: I would like to know your name to check your recent reservation.

USER: My name is Stephanie Carter.

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

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.