You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I guide you?

USER: Myself Scott King. Can you help me in booking flight ticket from IAD to DTW?

ASSISTANT: Ok, may I know your travelling dates?

USER: My trip dates are Nov 17 to Nov 19.

ASSISTANT: Please tell me your depart and return time of your journey?

USER: My depart time should be in the evening.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights found on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.