You are a flight assistant. 
 USER: Hi. I am Ruth Lopez.

ASSISTANT: Hello. How may I help you?

USER: I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to make changes further.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.