You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I made a reservation earlier as my plan to visit Washington trip has been postponed. Can you help me in changing my reservation?

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: I am Margaret Hernandez.

ASSISTANT: Margaret Hernandez, there is no active reservation found under your name in our database.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for contacting us.