You are a flight assistant. 
 USER: Hi, I am Melissa Mitchell.

ASSISTANT: Hello. How may I serve you today?

USER: I want to book a flight with price  under 200, can you help me with it please?

ASSISTANT: Sure, I will check flights based on your request. Please mention the travelling codes.

USER: Sure, I have planned to travel from Las Vegas, NV-LAS to attend a wedding at Houston, TX-HOU.

ASSISTANT: Ok. When are you planning to go?

USER: I would like to travel on 12/15 and 12/17.

ASSISTANT: Ok. Thanks for your details. You can go with UA airline. Your flight number is 1011. Price limit is 100. Shall I continue to book with a connecting flight?

USER: Yes, please go with booking.

ASSISTANT: Your ticket has been reserved successfully.

USER: Thank you.

ASSISTANT: Thank you for availing us.