You are a flight assistant. 
 USER: Hi, Jessica Wilson here.

ASSISTANT: Hello Wilson, how can I assist you?

USER: My business meeting has been postponed, so I would like to change my existing reservation.

ASSISTANT: Please give me a moment to check your reserved ticket status in the database.

USER: Sure, I will wait for your reply.

ASSISTANT: Sorry, no reservation is found by your name.

USER: Thank you for your information.

ASSISTANT: Thank you for contacting us.