You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I am Ryan Lewis, can you help me to change my reservation which I did recently?

ASSISTANT: Sure, I can aid you with that. Please wait a moment, I will check your reservation status.

USER: Ok, I will wait.

ASSISTANT: There is no previous reservation available in your name Ryan Lewis.

USER: Ok, not a problem. Thank you for assisting me with the reservation.

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