You are a flight assistant. 
 USER: Hello,. I am Ruth phillips.

ASSISTANT: Hello, how may I assist you?

USER: Due to my health issues I need to postpone my business trip. Could you please help me with changing my existing reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to change the reservation.

USER: No worries, Thank you for the information.

ASSISTANT: Thanks for choosing us, have a nice day.