You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My client meeting got postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Ok, may I know your name.\.

USER: My name is Patricia Walker.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.