You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight ticket from DCA to SFO?

ASSISTANT: Sure, please share your planned travel dates.

USER: My journey dates are Jan 20 to Jan 22.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Which airline would you prefer to fly?

USER: I am comfortable with any airline.

ASSISTANT: Are you flexible with any depart and return times?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Jacob Hernandez.

ASSISTANT: We have a connecting flight from Frontier airlines, number 1014 and the fare is 100. Shall I proceed with the booking?

USER: Ok, please proceed to book.

ASSISTANT: Your economy class seat is reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.