You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I have to change my reservation due to my planned trip got postponed. So please help me with that.

ASSISTANT: Sure, may I know your name?

USER: Thank you. Please check the reservation with my name Ruth Anderson.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.