You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to make a holiday trip to Oakland, can you please make a reservation from DCA to OAK?

ASSISTANT: Sure, may I know the planned travel dates to check for the flight availability?

USER: My journey dates are on May 4th  and 6th.

ASSISTANT: Please provide me the name to reserve the ticket.

USER: My name is Jonathan Anderson.

ASSISTANT: May I know the connection limit for this journey?

USER: I am looking for a flight with one connection.

ASSISTANT: Please provide me the class or airline preferences.

USER: I don't have any class or airline preference.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.