You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please reserve me a flight ticket from SEA to DCA?

ASSISTANT: Sure, could you please mention with your dates of journey?

USER: My trip dates are 09/05 - 09/07.

ASSISTANT: May I know your name please?

USER: Helen Evans here.

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

USER: My return time should be in the evening.

ASSISTANT: Please wait for a mean while.

USER: Ok.

ASSISTANT: Sorry Evans, there is no flight found as per your travelling details.

USER: No issues, thank you.

ASSISTANT: You are welcome.