You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: William Clark here.

ASSISTANT: How can I help you Clark?

USER: Due to the health issue of my grand mother, I want to cancel my recent reservation.

ASSISTANT: Sorry to hear that. Please wait a minute, meanwhile I will check for the active reservations.

USER: Ok.

ASSISTANT: Clark, there are no active reservations found with your details.

USER: That's not a big deal.

ASSISTANT: I will pray for your grand mother to get well soon.

USER: Thank you for your kind heart.

ASSISTANT: You are welcome.