You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that I can aid you?

USER: Unfortunately, my grandmother was hospitalised, So can you help me to change my reservation.

ASSISTANT: Sure, I can help you and may I know your name for checking your booking in our data base?

USER: Sure, Amy Brown here.

ASSISTANT: Let me check with your reservation, please wait.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation status found for the user name in our data base to change it.

USER: Ok, thank you.

ASSISTANT: Most welcome and thank you for reaching us.