You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Katherine Thomas, want to alter my recent reservation due to some emergency. Please help me out with that.

ASSISTANT: Ok, please allow me to check with your previous booking for a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. There is no active reservation found by your name.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for connecting with our services. Have a great day ahead.