You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I oblige you today?

USER: Owing to an emergency, my meeting with project manager in New York has been postponed. So I want you to change my existing reservation?

ASSISTANT: Sure, I'll help you with this. Please wait a moment I will check the reservation status.

USER: Sure.

ASSISTANT: Ok, give me sometime.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately there is no reservation by this name.

USER: Ok, no worries at all.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your support.