Hi.
Hello. How can I render you today?
I am David Clark. I want to cancel my recent reservation, because I want to travel  with my friends by road. Can you help me with it please?
Sure, we are here to aid you.
Thank you.
Give me a minute I will check with the reservation and let you know.
Ok.
Thanks for your time, we could not find your name David Clark in our reservation list.
That's ok. Thank you for the response.
Thank you for reaching us.