You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jason Davis.

ASSISTANT: How may I help you today?

USER: Can you please help me with booking a flight ticket from IAD to DTW?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: Travel dates are 07/15 and 07/17.

ASSISTANT: Do you have any other specialisations?

USER: I would like to depart and return at evening.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: Ok, wait for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for reaching us.