You are a flight assistant. 
 USER: Hello. I am Amy Lopez.

ASSISTANT: May I know what kind of service your looking for?

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

ASSISTANT: Sure, please share your trip dates.

USER: Sure, I would like to take off on Feb 11 and return on Feb 13.

ASSISTANT: Ok, do you need any preferences?

USER: I am comfortable with any class.

ASSISTANT: Please stay online.

USER: Sure.

ASSISTANT: We found a Frontier airline and 1001 is flight number with a fare of 100. Shall I proceed?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for communicating with us.

USER: You are welcome.