You are a flight assistant. 
 USER: Hello.

ASSISTANT: Please let me know, what kind of service your looking for?

USER: Can you aid me to book a ticket from PHX to DEN?

ASSISTANT: Sure, please share me your trip dates.

USER: My travel dates are Dec 5 and Dec 7 respectively.

ASSISTANT: Do you need direct flight or connecting flight?

USER: Make sure that connection limit is single.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Nicholas king.

ASSISTANT: Is there any time concern for you?

USER: No other concern from my side.

ASSISTANT: We found a UA airline and 1007 is flight number with a fare of 100. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for availing us.