You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I made a reservation earlier this week to give a seminar but my seminar date has been postponed. Can you help me in amending the reservation?

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

USER: Sure, the ticket has been reserved on the name Stephanie Taylor.

ASSISTANT: Sorry, there is no reservation with your given name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.