You are a flight assistant. 
 USER: Hello, I am Brenda Garcia.

ASSISTANT: Hello, how can I support you?

USER: Could you help me in booking a flight ticket from DCA to SEA?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please share me your planned travel dates.

USER: I will start on Dec 26, return on Dec 28.

ASSISTANT: Do you prefer either economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I do not have time preference.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: We have a flight from Southwest airlines, number 1021 and it is costing 200. Shall I proceed with it?

USER: You can proceed to booking.

ASSISTANT: Your seat is reserved in economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.