You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking a flight ticket from Washington, DCA to reach Phoenix, PHX?

ASSISTANT: Sure, please provide me your planned travel dates.

USER: My journey dates are from Aug 22 to Aug 24.

ASSISTANT: Do you prefer either economy or business class?

USER: I am ok with any class flight.

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

USER: I am comfortable with any time.

ASSISTANT: Do you have any specific airline preference?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: My name is Frank Nelson.

ASSISTANT: We have a connecting flight from Hawaiian airlines, number 1003 and the price is 100. Shall I proceed?

USER: Sure, you can proceed for booking.

ASSISTANT: Your ticket is reserved in economy class.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.