You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please make me a plane reservation from DTW to DFW?

ASSISTANT: Sure, may I know your trip dates please?

USER: I need to reach my destination by Feb 11th as I have appointment with my family doctor next day and will return on Feb 13th.

ASSISTANT: Ok, do you have any other requirements?

USER: No, I am fine with these essentials.

ASSISTANT: Ok, can I know your name please?

USER: I am Helen Phillips.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: That's Ok, thanks for your assistance.

ASSISTANT: My pleasure.