You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Jennifer Martinez. Can you please help me in changing my recent reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, sure.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for opting us.