You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: My name is Nancy Lopez. Can you please help me to change my current reservation?

ASSISTANT: Sure, I will help you.

USER: Ok, take your time.

ASSISTANT: There is no reservation on your name in our database.

USER: Ok, no problem. Thank you for reaching us.

ASSISTANT: Thank you for opting us.