You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: As my plans are not executed as they have to be. I need to change my flight ticket accordingly. Please help me.

ASSISTANT: Sure, I can help you. May I know your name?

USER: My name is Anna Lee.

ASSISTANT: Please provide your itinerary dates.

USER: Just to confirm, have you found my reservation details.

ASSISTANT: Yes.

USER: Thank you. My changed dates are August 23-25.

ASSISTANT: May I know your genesis and terminus airport codes?

USER: DTW and IAH are my in and out airport codes.

ASSISTANT: May I know your connection limit?

USER: Yes, I need a single connecting flight.

ASSISTANT: Do you have any specifications?

USER: Nothing much to specify.

ASSISTANT: Sorry Anna Lee, no flights are available on your route.

USER: That's ok. Thanks for your time.

ASSISTANT: Thank you for reaching us.