You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Will you help me in changing my recent reservation?

ASSISTANT: Sure, may I know your name to check in the reservation list?

USER: Dorothy Thompson is my name.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for contacting us.