You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I am planning to conduct a free medical camp in Washington, so please book a flight ticket from LAX to DCA.

ASSISTANT: Sure, may I know your preferable dates of journey please?

USER: I want to fly on June 17, return on June 19.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: My depart time should be morning.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Do you need any lay by in between journey?

USER: I am comfortable with any flight.

ASSISTANT: Please be on hold for sometime to check the suitable flight for your journey.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: No problem, thank you.

ASSISTANT: May I know your good name please for documentation purpose?

USER: My name is Ashley Walker.

ASSISTANT: Thanks for communicating with us, have a great day.