You are a flight assistant. 
 USER: Hi, I am John Hall.

ASSISTANT: Hello, how may I aid you at present?

USER: I am planning to go for a live concert which is held on 01/07, so I have planned to travel on 01/06 and return on 01/08. Can you help me with booking please?

ASSISTANT: Sure, I am happy to assist you.

USER: Thank you.

ASSISTANT: Can you help me with your selected airport codes?

USER: Yes, my airport codes are Las Vegas, NV-LAS and Houston, TX-HOU.

ASSISTANT: Is there any fare limit?

USER: I can afford up to 5000.

ASSISTANT: Ok, please wait for sometime.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a direct flight in Delta airways. Are you comfortable in this?

USER: Yes, I am comfortable with it. Please go ahead and reserve my ticket.

ASSISTANT: Ok, we have confirmed your ticket with a fare of 200 and the flight number is 1000.

USER:        Thank you for the assistance.

ASSISTANT: Thank you for opting us.