You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Matthew Parker.

ASSISTANT: Matthew nice to meet you.

USER: Due to some reasons, my trip has been postponed. Can you change my reservation.

ASSISTANT: Actually, there is no previous reservation found on your name.

USER: It's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.