You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Gary Brown. Can you help me in changing my recent reservation?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: Ok, No issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you.