You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please help me to book flight ticket from IAD to DTW?

ASSISTANT: Sure, could you please let me know your dates of journey?

USER: My trip dates are Feb 18 and Feb 20.

ASSISTANT: May I know your good name please?

USER: Myself Anna Gonzalez.

ASSISTANT: Are you looking for any other help from my side please?

USER: I prefer a single connection flight.

ASSISTANT: Ok, wait for a mean while please.

USER: Sure.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: That's ok, thank you.

ASSISTANT: You are welcome.