You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Kimberly Young.

ASSISTANT: How may I help you, Young?

USER: Owing to an emergency, I would like to change my reservation to some other dates. Please help me.

ASSISTANT: Sure, I will help you. young, no reservation has been found on your name in our database.

USER: Its ok, I guess I made a mistake while booking. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.