You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Due to my ill health issue, I would like to postpone my trip to Orlando. Could you please help me by changing My existing reservation?

ASSISTANT: Sure, I will help you. Please be online for a while, I will check your reservation status and let you know.

USER: Sure, I will wait for your response.

ASSISTANT: Please help me with your name.

USER: My name is Joseph Clark.

ASSISTANT: Clark, I have not found any reservation by your name in our database.

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

ASSISTANT: You are welcome and thank you for reaching us.