You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What type of service you are expecting from us?

USER: I have planned for the trip to Oakland, can you please search a flight from DCA to OAK?

ASSISTANT: Ok, I am here to help you in the ticket booking process. Could you provide me your itinerary dates?

USER: Thank you. I would like to start my journey on Feb-21st and I want to return back on the date Feb-23rd.

ASSISTANT: Ok, Do you have any other requirements?

USER: I am looking for a flight which is returning in the morning time.

ASSISTANT: Can I know your good name?

USER: My name is Laura Baker.

ASSISTANT: Please wait for a minute.

USER: Ok, please make sure that the connection limit should be at least one.

ASSISTANT: Sorry to say that, there are no flights available based on your journey details.

USER: It's ok, not a problem with that. Thank you for spending your time in searching the flight with my requirements.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.