You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Barbara Lopez, can you help me to change my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Just give a moment.

USER: Sure, take your time.

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

USER: No issues, thank you for your information.

ASSISTANT: Thank you for opting us.