You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency, I need to change my existing reservation. Can you help me with that?

ASSISTANT: Sure, I am here to help you. Please share your name.

USER: Sure, I have  a recent reservation with name Brenda Wright.

ASSISTANT: Thank you for providing your name. Sorry to say no reservation found on your name.

USER: Ok, no worries at all.

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

USER: Thank you for your help.