You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Robert Baker.

ASSISTANT: Robert Baker, how may I assist you today?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Will you help me with that?

ASSISTANT: I am glad you have contacted us. I will help you.

USER: Thank you for accepting my request.

ASSISTANT: Please allow me a minute to check with your reservation details.

USER: Ok, I will wait for your response.

ASSISTANT: Robert Baker, I am sorry to say that there is no booking done on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for understanding. Thank you for reaching us. Have a great time.