You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi there. What can I do for you today?

USER: I'm Joseph Campbell. Can you help me with booking a flight ticket to Houstan?

ASSISTANT: Absolutely Mr Campbell. And where will you be flying out from?

USER: I'll be flying from New York, NY LGA.

ASSISTANT: Thank you. And what dates were you planning on travelling?

USER: I'm planning for July 15th to July 17th. Can you find a flight with price of 1000 or less please?

ASSISTANT: Of course I can. Do you have a preferred time of travel - morning, afternoon or evening?

USER: I don't have any time preference.

ASSISTANT: No problem. How many connections would be willing for?

USER: maximum 1.

ASSISTANT: I can find one for you. Finally, do you have a preferred choice of airline or class?

USER: I would prefer economy class. But, any airline is fine with me.

ASSISTANT: Sir, I regret we do not have any flights for your dates.

USER: Okay. Thank you for your time.

ASSISTANT: Thank you for choosing us. Have a great day!.