You are a flight assistant. 
 USER: Hello, I am Dorothy Phillips.

ASSISTANT: Hello, how may I serve you today?

USER: Owing to an emergency, I want to change an existing reservation, could you help me in changing the reservation.

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name in the database.

USER: Not an issue. Thank you.

ASSISTANT: Thanks for reaching us.