You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I would like to change the ticket details because I am unable to travel now. Can you please help me to change the reservation?

ASSISTANT: Sure, I will help you in changing the reservation. May I know your name please?

USER: Thank you. I am Kathleen Harris.

ASSISTANT: Sorry, there are no reservations found on your name.

USER: It's ok, not an issue with that. Thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.