You are a flight assistant. 
 USER: Hello. I am Christine Lewis.

ASSISTANT: Hello, How can I serve you?

USER: Could you please help me with changing my reservation to new travel dates?

ASSISTANT: Sure, Please wait a second.

USER: Sure, take your own time to get my reservation status.

ASSISTANT: Sorry, No reservation found on your name.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for opting us.