You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what help that I can assist you?

USER: I would like to change my flight reservation due to an emergency, can you please help me?

ASSISTANT: Sure, I am glad to help you. Can you please mention on whose name the ticket has booked?

USER: Sure, my name is Donna Gonzalez.

ASSISTANT: Please be on hold for a moment to check it.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name in our data based to help you in changing process.

USER: No problem, thank you for checking.

ASSISTANT: You are most welcome and thank you for utilising our service to your help.