You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to amend an existing reservation due to an emergency, can you please help me out?

ASSISTANT: Ok, please may I know your name?

USER: Sure, I am Samantha Lewis here.

ASSISTANT: Ok, please wait a moment I will check for the reservation.

USER: Sure, I will wait.

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

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing our agency.

USER: Thank you for your information.