You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you today?

USER: Owing to an emergency, I want to change my existing reservation, will you help me in it?

ASSISTANT: Sure, we are here to aid you. Can I have your name please?

USER: My name is Catherine Phillips.

ASSISTANT: Ok, wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found on your name in our database.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you for choosing us.