You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to attend music concert at PHX, can you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, We are here to assist you. Can I know your travelling dates?

USER: Sure, I would like to take off on Apr 15 and return on Apr 20.

ASSISTANT: Do you need any break?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Carolyn Gonzalez.

ASSISTANT: Can you please re-check your travelling dates?

USER: Sorry, my depart date is on Apr 18 and return date is on Apr 20.

ASSISTANT: Is there any other specifications?

USER: I don't have any preference.

ASSISTANT: Please wait a while.

USER: Sure, take your time.

ASSISTANT: We found a connecting flight with an Frontier airlines, flight number:1001.

USER: Yes, please proceed with the booking.

ASSISTANT: Your flight ticket has been reserved with an economy class.

USER: I appreciate your help, thank you.

ASSISTANT: Thank you for picking us.

USER: You are welcome.