You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Paul Thomas here.

ASSISTANT: How may I guide you today?

USER: Can you please help me in changing my recent reservation? As my planned trip has been postponed.

ASSISTANT: Sure, I will help you with that. Please wait for a minute.

USER: Sure, I'll be online.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: Oh! That's ok, thank you.

ASSISTANT: Thank you for reaching us.