You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want to change my recent reservation, because my friends are planning for some other trip. Can you alter my ticket?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name for checking your previous reservation status?

USER: My ticket is booked with name Ronald Nelson.

ASSISTANT: Ok, give me a moment, I will check your previous reservation.

USER: Ok, take your time.

ASSISTANT: There is no previous reservation available on your name Ronald Nelson.

USER: It's ok, no issues.

ASSISTANT: Do you want to know any thing else from us?

USER: No, anyway's thank you for searching.

ASSISTANT: Thank you for contacting us, have a nice day Ronald.