You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Angela Collins. I am looking to reserve a flight ticket to reach Washington, can you please find a flight from Los Angeles?

ASSISTANT: Sure, we are perky to serve you.

USER: Thank you.

ASSISTANT: Can you share me your trip dates?

USER: I would like to travel on the dates of Nov 05 and Nov 07.

ASSISTANT: Is there any class preference for you?

USER: No, I didn't have any class preference.

ASSISTANT: Do you need any way station in your journey?

USER: I need a single connecting flight to travel.

ASSISTANT: May I know your depart time and arrival time?

USER: I am comfortable to depart in the afternoon time and return in the afternoon time.

ASSISTANT: Do you have any other preferences?

USER: No, I didn't have any other preferences.

ASSISTANT: May I know your airport codes?

USER: The source and destination airport codes are LAX and IAD.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: It's ok, not a problem with that. Anyhow thanks a lot for checking the flight availability.

ASSISTANT: Thank you for availing us.

USER: You are welcome.