You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Rachel Hall here.

ASSISTANT: How can I help you?

USER: I have to cancel my reservation which I have done earlier to participate in dance programme but unfortunately I have stay back here to take care of my grandmother. Can you please help me out with cancelling of my reservation?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Thanks.

ASSISTANT: Please give me a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: Anyway, thanks for the information.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.