You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Helen Martin.

ASSISTANT: How can I assist you now?

USER: I would like to change my flight ticket booking done in the previous month, so can you please help me in ticket modification?

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

USER: Thank you for accepting my request.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Helen Martin, no reservation has found under your name to change.

USER: Ok, no issue with that one.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Thank you for your immediate help in providing your information.