You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me to modify my ticket details because my trip got postponed?

ASSISTANT: Sure, I will help you in changing your reservation.

USER: Thank  you.

ASSISTANT: May I know your name please?

USER: My name is Kathleen Allen.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there are no reservations found.

USER: It's ok, thank you for searching and providing the information.

ASSISTANT: Thank you for reaching us.