You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Catherine Williams.

ASSISTANT: How can I aid you at this moment?

USER: My trip got postponed. Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you. Please give me a moment to check your reservation status. Catherine Williams, there is no active reservation found under your name in our database.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for contacting us.