You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am trying to change my reservation, because my examinations are postponed and scheduled at my planned travel dates, so I need to change my travel dates. Could you help me?

ASSISTANT: Sure, can I have your name, so that I will check the reservation in our database.

USER: I have reserved my past ticket with name Sandra Taylor.

ASSISTANT: Sorry Taylor, no reservation found on your name.

USER: It's ok, no issues.

ASSISTANT: Do you want any other help?

USER: No, anyways thank you for your information.

ASSISTANT: Thank you for consulting us.