You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I oblige you?

USER: Due to some emergency meeting I want to change my existing reservation. Can you help me with it.

ASSISTANT: Sure, I will help you. Please provide your name to check the reservation status.

USER: I am Debra Baker.

ASSISTANT: Please wait a moment. I will revert to you.

USER: Sure.

ASSISTANT: Thanks for your patience. There was no reservation found on your name.

USER: Thank you for the information.

ASSISTANT: Thank you for picking us.