You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I need your assistance in reserving the flight ticket, can you please help me find a flight in the route Denver to Philadelphia?

ASSISTANT: Sure, I will help you with that. Can I have your dates please?

USER: Thank you.  My travel dates are May 12 and May 14.

ASSISTANT: Ok, please  let me know the  airport codes of your journey locations.

USER: The airport codes are DEN and PHL.

ASSISTANT: Ok, please provide me the timings of your journey.

USER: No, thanks for asking.

ASSISTANT: Do you prefer any specific class to travel?

USER: No, I didn't have any preference about the class but please provide me a connecting flight to travel.

ASSISTANT: Ok, please wait a moment.

USER: OK, take your time.

ASSISTANT: Frontier airlines running a flight in your route with connection 1 and the ticket fare is 100. Shall I proceed with booking?

USER: Yes, please proceed to reserve the ticket.

ASSISTANT: Can I have your good name please to proceed booking process?

USER: My name is Alexander Nelson.

ASSISTANT: Ok, your ticket booking has done and the flight number is 1013.

USER: Thank you for assisting me.

ASSISTANT: Thank you for choosing us, have  a great journey.

USER: You are welcome.