You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you right now?

USER: Owing to an emergency I had to request for this change reservation, Can you please help me in that?

ASSISTANT: Sure, I will help you with your request. Can you please provide your name to check your previous reservation?

USER: My name is George Williams.

ASSISTANT: Please wait a moment to check.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry as per your concern I can not amend your reservation as your reservation is not found as per our records.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us, hope you have a great day.