You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am John Martinez. I want to alter my recent reservation due to some emergency. Please help me out with that.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no reservation been booked on your name.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for connecting with our agency.