You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Please help me out in changing my existing reservation, which is done recently?

ASSISTANT: Sure, I am here to aid you with, can I know your good name to change your recent reservation?

USER: Thank you for considering my request. My name is Michelle Gonzalez.

ASSISTANT: Please wait for a while.

USER:   Sure, I will wait for your response.

ASSISTANT: Sorry, no reservation is found on your name in our records.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for opting us.

USER: Thank you for your service.