You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you today?

USER: Due to an emergency, I want to change my reservation. Can you help me?

ASSISTANT: Ok. I will help you. May I have your name please?

USER: John Perez here.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation is found on your name to proceed further.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you.