You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Please help me in booking flight ticket from SFO to DCA to attend meeting.

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My trip dates are Oct 17 to Oct 19.

ASSISTANT: Do you require any stopovers in your journey?

USER: I am okay with any flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: My return should be in the afternoon.

ASSISTANT: Please share your name.

USER: Carolyn Perez.

ASSISTANT: Ok, please wait a minute I will get back to you with the flight details.

USER: Ok.

ASSISTANT: Sorry to inform, no flights found with your requirement.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for reaching us.