You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Mistakenly I booked my source as destination in my recent reservation. I would like to cancel that reservation.

ASSISTANT: Ok, I will surely help you. Can I have your name please to check your details in our database?

USER: Sure. My name is Sandra Davis.

ASSISTANT: Sandra, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, there is no reservation found under your name in our database.

USER: It's ok. Thank you for your response.

ASSISTANT: You are welcome. Thank you for reaching us, Sandra. Have a nice day.