You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to book a flight ticket with in the price limit 500?

ASSISTANT: Sure, may I know your good name please?

USER: My name is Thomas Moore.

ASSISTANT: When do you plan your trip?

USER: I will depart on 08/16 and I intend to return on 08/18.

ASSISTANT: Can you please mention your airport codes?

USER: I would like to travel to TX-HOU from NV-LAS to attend my family meeting.

ASSISTANT: Ok, give me sometime.

USER: Sure, take your time.

ASSISTANT: Thank you for being wait. There is a Delta airline with flight number 100 and price of 100 matching your request.

USER: You can book the ticket with this airline.

ASSISTANT: Ok, your reservation is done.

USER: Thanks for your assistance.

ASSISTANT: Thank you for contacting us.