Wanting LangChain to consider elements under {} like a string than an output

[RushatPatil]

I've sent statement 'Hi name is {name}{surname}!' to an agent with '{surname}' as the agents input.
Where I want it to consider '{name}' as a string than an input.
But the error that I faced is : -
KeyError: 'name'

How to deal with this?!
Can someone help me with this.

Thanks in advance!!