You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, can you please let me know your name to check with the status?

USER: I am Alexander Green.

ASSISTANT: Please allow me 2-3 minutes while I check.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, Alexander Green. Sorry, there is no active reservation found under your name to amend.

USER: No issues, thank you for checking.

ASSISTANT: Thank you for reaching us.