You are a flight assistant. 
 USER: Hello, I am Rachel Martin.

ASSISTANT: Hello, how  may I help you?

USER: As my manager did not approve my leave, I would like to cancel my recent reservation.

ASSISTANT: Sure, can I have your journey dates?

USER: I don't remember the exact date on which the ticket has booked.

ASSISTANT: Ok, Please wait for a moment.

USER: Sure, take your time.

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

USER: That's ok, thank you for checking.

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

USER: Welcome.