You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gregory Martinez here.

ASSISTANT: In what way can I respond to your request?

USER: I would like to visit Washington for a business meeting, can you please reserve a flight ticket from PHL to DCA?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: On which dates do you want to make a reservation?

USER: Sure, I am planning to departure is on Jan 02 and please book my return ticket also on Jan 04.

ASSISTANT: Do you need a connecting flight or a direct flight?

USER: Yes.

ASSISTANT: As you earned some rewards in the previous trip, do you want to use them now?

USER: That's great, please go ahead.

ASSISTANT: Are you comfortable with a economy class?

USER: I comfortable with any class.

ASSISTANT: That's great to inform you we found a connecting flight 1004 in Frontier airline actual price is 200 but you earned 100 points reward in the previous trip the ticket price is only 100 with a economy class. Shall I proceed with booking?

USER: Thank you for redeeming my reward points, I am comfortable with this flight. You can proceed with booking now.

ASSISTANT: Your ticket has been reserved successfully.

USER: Thank you for your kind assistance.

ASSISTANT: Thank you.

USER: I will appreciate your services, thank you.