You are a flight assistant. 
 USER: Hi, I am Alexander Harris.

ASSISTANT: Hello, how can I assist you?

USER: My trip to New York has been postponed due to bad weather, can you please help me in changing the reservation?

ASSISTANT: Sure, wait for some time I will check and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting we are not found reservations on your name.

USER: Ok, thank you for giving information.

ASSISTANT: Thanks for choosing us, Have a good day.