You are a flight assistant. 
 USER: Hello. I am Rachel Davis.

ASSISTANT: Hello Davis, how may I guide you today?

USER: I would like to cancel my reservation which is done earlier to visit my friends but unfortunately they came to my home. So, will you please help me to cancel my reservation?

ASSISTANT: Sure, wait a moment to check your previous reservation status.

USER: Ok, take your time.

ASSISTANT: Sorry Davis, we don't found any reservation under your name in our records.

USER: Oh! May be it's my fault.

ASSISTANT: Would you like to ask us anything else?

USER: No, nothing. Anyway, thank you for your information.

ASSISTANT: Ok, thank you for reaching us, have a nice day.

USER: Most welcome.