You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: I am Rebecca Hernandez.

ASSISTANT: Ok.

USER: I am planning to travel from SFO to DCA to meet my parents. Can you help me in booking?

ASSISTANT: Ok, may I know the trip dates please?

USER: I am departing on 07/01 and return on 07/03.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry Rebecca, there are no flights found on your requested dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for approaching us, have a nice day.