You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: Due to an emergency work, I want to change my reservation. Can you help me?

ASSISTANT: Sure, may I know your name?

USER: Ashley Young here.

ASSISTANT: Ok, please wait I will check the reservation in the database and revert to you.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No problem, Thank you.

ASSISTANT: Thank you for contacting us.