You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am James Adams.

ASSISTANT: How may I assist you?

USER: I would like to change my existing reservation due to typical climatic conditions in my visiting place. Will you help me with this?

ASSISTANT: Sure, I am here to help you. Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: James, no reservation has been found on your name in our database.

USER: Oh! It seems, something went wrong while booking the ticket previously. Anyways, thank you for providing information.

ASSISTANT: Thank you for approaching us.