You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: James Lopez here. I want to change my reservation, can you please help me in that?

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found basis on your details.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.