You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Christine Evans.

ASSISTANT: How can I assist you at this moment?

USER: Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: Sure, I am glad to help you in cancelling your reservation.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry Evans, there is no active reservation found under your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.