You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Eric Hall.

ASSISTANT: How can I assist you?

USER: Can you please reserve me a flight ticket from DEN to DTW?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please share your planned journey dates?

USER: My trip dates are 09/03 - 09/05.

ASSISTANT: Do you have any other specifications?

USER: My return time should be in the evening.

ASSISTANT: Thank you for sharing the details.

USER: My pleasure.

ASSISTANT: I am sorry to inform you that, there were no flights available that matches your requirements.

USER: Not a problem, thank you.

ASSISTANT: Thank you for approaching us.