You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Melissa Perez. I do not want to travel in the flight which I booked previously. I heard from many people that the airlines is not giving good service, can you help me to do some modifications?

ASSISTANT: Sure Perez, I will help you in changing your reservation.

USER: Thanks.

ASSISTANT: Ok, please wait a moment I will check the flight status and let you know?

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry, there are no reservations found on this name.

USER: Oh! It's ok no problem, may be I am not booked my ticket properly at that time. Thank you for your information.

ASSISTANT: Thank you for choosing our services.

USER: Welcome.