You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Michael Lopez, I want to change my reservation as I need a low fare flight ticket for my journey to Dallas. Please help me in changing my reservation?

ASSISTANT: Sure, we are here to help you. Wait for some time I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservations found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thanks for approaching us.