You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I be of your help?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: Sure. Please let me know your name to check the reservation status.

USER: I am Anna Phillips.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not found any reservation by your name.

USER: Thanks.

ASSISTANT: Thank you for reaching us.