You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ashley Williams from Seattle.

ASSISTANT: How can I help you?

USER: I want to alter my existing reservation due to some family problems. Can you please help me with this?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Thank you.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.