You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I would like to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, can I have your good name please to check your reservation status?

USER: Thank you for considering my request. Myself Jennifer Garcia.

ASSISTANT: Ok,  please wait a  moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Jennifer Garcia, no reservation has found under  your name to change.

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

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.