You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Help me in changing my flight reservation. As I modified my journey dates.

ASSISTANT: May I know your name please to check the status of your reservation?

USER: Stephen Evans here.

ASSISTANT: Thank you. Please stay online for a while, I will check your reservation status and let you know.

USER: Sure.

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

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thanks for checking.