You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Samuel Martin here. My client meeting has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry no reservation found on your name.

USER: No problem, thank you.

ASSISTANT:    Thank you for reaching us, have a good day.