You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Myself Michelle Parker. I am planning my weekend trip to travel Dallas urgent. Can you please help me in changing the reservation?

ASSISTANT: Sure, please wait a moment I will check the status and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to inform, no reservation found with your name.

USER: Not a big problem, anyhow thank you very much for your service.

ASSISTANT: Thanks for approaching us.