You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Charles Lewis, in my hometown heavy rains, so I unable to travel at this moment so can you change my reservation?

ASSISTANT: Sure, please wait for a moment to check your details in my records.

USER: Ok, I will wait for your reply, but get back with my reservation status.

ASSISTANT: Sorry, no reservation found on your name.

USER: Oh! It's ok, no problem.

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

USER: Thank you for your services.