You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jerry Martin here.

ASSISTANT: How can I aid you?

USER:   Yesterday I booked a ticket to New York through your agency, your agent by mistakenly booked a ticket on wrong dates, so I want to change my reservation.

ASSISTANT: Ok, give me a minute.

USER: Ok.

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

USER: That's ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.