You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I have made a reservation earlier to attend for a Musical Concert with my friend, but my friend is not feeling well, so we changed the decision to other dates. Will you please help me to change my reservation?

ASSISTANT: Yes, can you share me your name?

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

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.