You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I render you today?

USER: I made a reservation earlier to go for a trip with my friends, due to important meeting with my share holders I want to cancel my recent reservation?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: Let me know your name for checking your reservation.

USER: I am Margaret Hall.

ASSISTANT: Thanks for your name. Please, wait for a while I will  check the reservation and revert to you.

USER: Ok.

ASSISTANT: Thanks for your time, we could not find any reservation with your name.

USER: No worries at all, thank you for the information.

ASSISTANT: Thank you for availing us.