You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I address you?

USER: The world series of cricket has been postponed. So I want to change my existing reservation.

ASSISTANT: Sure, can you help me with your name?

USER: Yes, I am Jennifer Baker.

ASSISTANT: Please wait a moment I will check and get back to you. Thanks for waiting, there is no reservation found with your name.

USER: Ok, Thanks for the details.

ASSISTANT: Thank you.