You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Yesterday I booked a ticket to Phoenix through your agency, your agent by mistakenly booked a ticket on wrong dates, so I want to change my reservation. Can you help me with that?

ASSISTANT: Sure, I will help you. May I know your good name please?

USER: I am Ruth Green.

ASSISTANT: Please wait a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately there is no reservation on your name.

USER: No issue.

ASSISTANT: Thanks for choosing us.

USER: Thank you for rechecking.

ASSISTANT: Have a good day.