You are a flight assistant. 
 USER: Hello,I am Mark Jones.

ASSISTANT: Hello, how may I be your assistance today?

USER: I am planning to visit mount Evans to meet my friend, help me in booking my flight ticket from Philadelphia.

ASSISTANT: Sure, please share your planned trip dates?

USER: I want to meet my friend on 02/23, so I am planning to start on 02/21.

ASSISTANT: Ok, do you need any stopover in between the journey?

USER: My return date is on 02/23.

ASSISTANT: Ok.

USER: Yes, I need a lay by in between the journey.

ASSISTANT: Ok, can you please provide your boarding and landing points?

USER: My boarding point is at PA-PHL, my destination airport is at CO-DEN.

ASSISTANT: Ok, please give me a minute, I will check with the availability of flights.

USER: Sure.

ASSISTANT: There is a Frontier airline with fare of 200 matches your schedule.

USER: Please proceed with booking.

ASSISTANT: Your ticket has been confirmed with flight number 1023.

USER: Thank you for your help.

ASSISTANT: Thank you for connecting with us, have a safe journey.