You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I am Helen Phillips. Can you please make a flight reservation from DCA to DTW?

ASSISTANT: Sure, can I have your trip dates?

USER: I will fly on 10/06 and return on 10/08.

ASSISTANT: We do not found any flights running in your preferred dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.