You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to modify my travel dates in my recent reservation?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: Thank you for considering my request. My name is Jonathan Johnson.

ASSISTANT:  I am very sorry to inform you that there is no reservation found under your name in our database.

USER: It's ok, not a problem with that. Thank you for checking my ticket status.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.