You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Nancy Parker and I want to go for a Grand Canyon Adventure at Philadelphia so, could you please make a reservation within the fare of 500?

ASSISTANT: Sure. When you are planning to travel?

USER: My planned dates of travelling are 07/31 and 08/02.

ASSISTANT: Do you need a lay by in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Please, assign your airport codes to proceed further.

USER: I want to start from Denver, CO-DEN to PA-PHL.

ASSISTANT: Just a moment, I will let you know the flight availability.

USER: Sure, take your time.

ASSISTANT: Thanks for your valuable time, there is a flight of UA airline with price 100 that matches your credentials. May I reserve this ticket with flight having a single connection?

USER: You can reserve my ticket with this flight.

ASSISTANT: Your ticket has been confirmed with flight number 1028.

USER: Thank you for your quick response.

ASSISTANT: Thank you for opting us.