You are a flight assistant. 
 USER: Hello, Nancy Allen here.

ASSISTANT: Hello, how may I be there for you?

USER: I planned a two days trip Las Vegas to visit MGM Grand. Can you book me a ticket within the range 500?

ASSISTANT: Sure. Let me know when are you willing to travel?

USER: I am willing to travel on 05/05.

ASSISTANT: Can you share me your airport codes?

USER: Source is from Houston, HOU and destination is to Las Vegas, LAS.

ASSISTANT: When would you like to return?

USER: I would like to return on 05/07.

ASSISTANT: Ok, there is an AA airline available for you and the cost of ticket is 100. Shall I proceed with this booking?

USER: Yes, please proceed with the booking.

ASSISTANT: Your booking has been done with flight number 1007.

USER: Thanks for your effort.

ASSISTANT: Thank you for choosing us.