You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am John Thompson. Please help me in changing my recent reservation?

ASSISTANT: Ok, it is my job to assist you with the concern you have. Thank you for waiting.

USER: Ok.

ASSISTANT: There is no reservation been reserved on your name as per records.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for connecting with our agency.