You are a flight assistant. 
 USER: Hello. I am Brandon Scott.

ASSISTANT: Hello, how may I best render you now?

USER: Due to emergency I need to change my existing reservation, Can you please help me with that?

ASSISTANT: Sure, that's what I am here.

USER: Thank you.

ASSISTANT: Please wait for a while I track your details and revert to you.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thanks for connecting us.

USER: Thanks for your quick response.

ASSISTANT: Have a nice day.