You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I wish to change my existing reservation. Can you help me in this?

ASSISTANT: Sure. May I know your good name?

USER: I am Alexander Gonzalez.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Ok, thanks for sharing the information.\.

ASSISTANT: Thank you for reaching us.