You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for today?

USER: I am looking to change my trip dates because my trip got postponed. Can you please help me?

ASSISTANT: I will try my best for helping you about that. Can you please provide your name for checking active reservation status?

USER: Thank you. My name is Ashley Allen.

ASSISTANT: Sorry, there is no active reservations under your name Allen.

USER: It's ok, thank you for searching.

ASSISTANT: Thank you for reaching out here.

USER: Welcome.