You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Michael Smith. I need to amend my reservation due to some crisis in my location, can you help me out?

ASSISTANT: Sure, I will try to amend your reservation, please wait for a minute to check the reservation details.

USER: Sure, take your own time.

ASSISTANT: Thanks for your patience, I could not find any reservation with your name in our database to amend your reservation.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Welcome, have a nice day.