You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I am Rachel Adams, due to some personal issue I want change my recent reservation, can you help with this?

ASSISTANT: Sure Rachel Adams, wait a moment let me check the status of your reservation.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no reservation found under your name to change your reservation.

USER: That's fine, anyway thanks for your information.

ASSISTANT: Ok, thanks for choosing us.