You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best I can aid you at present?

USER: I have made a reservation earlier to visit all the places in Boston, but due to bad weather conditions there, I have decided to visit in next month. Can you please help me in changing?

ASSISTANT: Sure, we are glad to help you to change it.

USER: Thank you for accepting my request.

ASSISTANT: On whose name, your reservation has been done earlier?

USER: Sure, I am Frank Johnson.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Ok, I will wait.

ASSISTANT: Sorry to say that, there was no reservation found on your name to change it.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing our service.