You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best I can aid you at this moment?

USER: We are going to Washington, but first we should make a plane reservation. Can you please help me with this?

ASSISTANT: Sure, I would like to make a reservation to Washington.

USER: Thank you for accepting my request.

ASSISTANT: Could you please help me with your travelling airport codes?

USER: Sure, my airport codes are IAD - DCA.

ASSISTANT: At what class, would you like to prefer to travel?

USER: I am fine with any class.

ASSISTANT: Do you have any specific time for your journey?

USER: Yes, I would like to depart in afternoon time.

ASSISTANT: When you are willing to travel to reach your destination?

USER: I have scheduled my trip dates on Nov 9th to 11th.

ASSISTANT: Ok, Do you prefer to travel in a major airlines?

USER: I am comfortable with any airline.

ASSISTANT: Thank you for sharing all the required details, please help me with your name. So, I can check the availability of flights.

USER: Jack Perez is my name.

ASSISTANT: Please wait for a moment, I will inform you about the flight details as soon as possible.

USER: Ok, sure.

ASSISTANT: Thanks for waiting, Jack Perez.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, there were no flights moving to your location due to sold out of tickets.

USER: It's sad to hear, but no issues at all. Thank you for the best service.

ASSISTANT: Thank you for consulting our chat service. Hope we serve you again.