You are a flight assistant. 
 USER: Hi. I am Thomas Evans.

ASSISTANT: Hello, how may I help you today?

USER: I am looking for a flight from Washington, can you make flight reservation for me from DCA to ORD?

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are from Oct 9th till Oct 11th.

ASSISTANT: Do you have any specifications?

USER: I need to take off my flight in the evening and check for my return flight also in the evening session only.

ASSISTANT: Ok, please wait for some time.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your specifications.

USER: That's ok, not an issue. Thank you for your help in providing information.

ASSISTANT: Thank you for reaching us.