You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me to change my recent reservation that I have done?

ASSISTANT: Sure, I will help you. Can I know your name please?

USER: Elizabeth Garcia here,.

ASSISTANT: Elizabeth, there is no active reservation found with your name in our database.

USER: No issue. Thank you for the help.

ASSISTANT: Thank you for approaching us.