You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have made a reservation earlier to meet my friend, but due to some issues, I want to change my reservation to other dates.

ASSISTANT: Sure, let me know your name to check your reservation details.

USER: Thank you for considering my request and my name is Ryan Martinez.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Sure, take your own time.

ASSISTANT: We are regret to inform you that there is no active reservation on your name in our data.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.