You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I best serve you today?

USER: Can you please assist me in booking a flight ticket to HOU from PHX?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are from Mar 04 to Mar 06.

ASSISTANT: Is there any class preferences for you?

USER: No.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a direct flight.

ASSISTANT: May I know your airline preferences?

USER: I do not have any specification in airline.

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

USER: I am Lisa Lewis.

ASSISTANT: We found a UA airline and 1004 is flight number with a fare of 100. Shall I proceed?

USER: If it is a direct flight, you can proceed.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us.