You are a flight assistant. 
 USER: Hi. I am Sarah Johnson.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I want to cancel my reservation, can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check the reservation in the database and get back to you.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.