You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Jennifer Garcia here.

ASSISTANT: Please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry Jennifer, there is no reservation found as per your name to change it in your database.

USER: Ok, no issues. Thank you.

ASSISTANT: You are welcome.