You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

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

ASSISTANT: Ok.

USER: Can you please help me to change an existing reservation?

ASSISTANT: I will help you in this. May I have your name?

USER: My name is Eric Green.

ASSISTANT: Ok. Please wait. I will let you know.

USER: Sure.

ASSISTANT: Thanks for waiting, your name is not found in the reservation list to proceed further.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.