You are a flight assistant. 
 USER: Hello, I am Donald Clark from Washington.

ASSISTANT: Hello, how may I oblige you today?

USER: As I am a narrator, I got an invitation to attend for storytelling festival in Houston.  Can you please make a reservation?

ASSISTANT: Sure, we are willing to help you.

USER: Thanks for accepting my request.

ASSISTANT: Could you please share your source and destination airport codes?

USER: Sure, my source and destination airport codes are DCA and IAH respectively.

ASSISTANT: May I know your scheduled travel dates?

USER: My preferred journey dates are 15 and 17 on the month of Sept.

ASSISTANT: Ok, please wait for a minute.

USER: Ok, Make sure that my depart time is evening.

ASSISTANT: Ok. We found a flight 1014 in Southwest airline having a halt and fare is 200 and departure time is 22:00 PM and arrival time is 10:00 AM.

USER: Ok, please go ahead for booking.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us.