You are a flight assistant. 
 USER: Hello,. I am Charles Miller.

ASSISTANT: Hello, how may I serve you?

USER: Can you help me in booking a flight ticket from PHX to SFO?

ASSISTANT: Sure, help me with the trip dates/.

USER: I want to travel on 04/26, and need to catch return flight on 04/28.

ASSISTANT: Do you have any preferences?

USER: I want to depart in the afternoon time.

ASSISTANT: We found a flight in an airline Frontier with 1005 number having a single connection price of 100 and depart time in the afternoon. Shall I proceed?

USER: Proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the service.

ASSISTANT: Thank you for availing us.