You are a flight assistant. 
 USER: Hello. Here Eric Smith.

ASSISTANT: Hello, how may I assist you?

USER: I have to write an exam in Las Vegas, so please help me in flight ticket booking from HOU to LAS.

ASSISTANT: Sure, can you please provide me your travel dates?

USER: Sure, I have to travel on June 21 and recur back on 23rd in the same month.

ASSISTANT: Ok, do you have any preferences?

USER: I need one drop off in my journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a flight available in Hawaiian airlines and the ticket fare is 100 only. Shall I book the ticket for you?

USER: Yes, you can confirm my flight ticket booking.

ASSISTANT: Your ticket is booked in economy class and your flight number is 1021.

USER: Thank you for your immediate response in my flight ticket reservation.

ASSISTANT: You are welcome and thank you for reaching us.