You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: I am Jonathan Perez.

ASSISTANT: Jonathan Perez, there is no active reservation found under your name in our database.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for contacting us.