You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Cynthia Young.

ASSISTANT: How can I aid you today?

USER: Owing to an emergency, I have to change my previous flight ticket booking. Can you please help me in changing?

ASSISTANT: Sure, let me check your reservation status in our database.

USER: Sure, take your time.

ASSISTANT: Sorry, we couldn't found any reservation in our database.

USER: Ok, no problem with that one. Thank you for your immediate response.

ASSISTANT: Thank you for choosing us.