You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Owing to an emergency, my meeting with client got postponed. Can you help me in changing my existing reservation.

ASSISTANT: Sure, may I know your name please?

USER: Sure, Cynthia Martinez here.

ASSISTANT: Wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any active reservation in your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.