You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me to change my reservation? Because I have some work on that date.

ASSISTANT: Sure, I am glad to help you. Could you please provide your name to check your reservation status?

USER: Good to hear that from you. My name is Frank White.

ASSISTANT: Ok, please wait a moment I will check your reservation details and proceed further.

USER: Sure.

ASSISTANT: Sorry to say, I did not find any reservation on your name.

USER: Not an issue.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thank you for your response.