You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Frank Robinson here. Please help me by changing my recent reservation.

ASSISTANT: Sure, I am here to help you.

USER: Thank you for the assurance.

ASSISTANT: Please wait a moment, I will check your reservation status.

USER: Sure, I will be here.

ASSISTANT: Frank Robinson, no reservation has been found on your name in our database.

USER: Not a problem, I will recheck with my flight details. Thank you.

ASSISTANT: Thank you for reaching us.