You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Deborah Roberts. I am looking for a flight from OAK to DCA, can you help me?

ASSISTANT: Sure, I will help you. May I know your planned journey dates?

USER: My travelling dates are 11 and 13 of Oct.

ASSISTANT: Do you need a stopover in between your journey?

USER: I need a connecting flight.

ASSISTANT: Let me know your class preference.

USER: No, I would like to depart in the morning.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Thank you for sharing the details. There were no flights available that matches your requirements.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for availing us.