You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I need to travel from DCA to SEA, can you help me in doing that?

ASSISTANT: Sure, I am here to help you. Let me know your planned travel dates?

USER: My trip dates are July 31 to Aug 02.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Do you want to fly in economy class or business class?

USER: I am comfortable in any class.

ASSISTANT: Do you have any specific travel timings?

USER: Please ensure that my return time must be in afternoon.

ASSISTANT: Would you like any break in between your journey?

USER: I need a single connecting flight.

ASSISTANT: Ok, please share your name to proceed further?

USER: I am Andrew Jackson.

ASSISTANT: Sorry, no flights found as per your requirement.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us and have a nice day.