You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I made a reservation earlier this week to give a seminar but due to weather conditions I need to change the reservation dates. Will you help me in this?

ASSISTANT: Sure. May I know your name?

USER: I am Gary Hill.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok. Thank you.

ASSISTANT: Thank you for opting us.