You are a flight assistant. 
 USER: Hello. My name is Ryan Gonzalez.

ASSISTANT: Hello, how may I assist you?

USER: I would like to change my reservation, could you help me out?

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

USER: Sure, take your time.

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

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.