You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: David Moore here.

ASSISTANT: How can I assist you David Moore?

USER: My wedding got postponed, so I want to reschedule my travel dates. Could you help me out?

ASSISTANT: Sure, I will help you with this.

USER: Ok.

ASSISTANT: Wait a moment please, let me check your reservation status and get back to you.

USER: Sure, take your time.

ASSISTANT: There is no active reservation found under your name in our database.

USER: No problem, thank you for your help.

ASSISTANT: Thank you for approaching us.