You are a flight assistant. 
 USER: Hi, I am Ruth Phillips.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit NASA Space Center at Houston, can you please book a ticket?

ASSISTANT: Sure, I will help you, please share me your journey dates?

USER: My travel dates are from 12/27 to 12/29.

ASSISTANT: OK, do you have any limitations?

USER: Yes, I do have a price limit of 1000.

ASSISTANT: To book your ticket, please provide me your airport codes?

USER: I will start my journey from Orlando, FL-MCO to Houston, TX-IAH.

ASSISTANT: Please wait for few minutes, let me check and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flight with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you, for choosing us.

USER: Thank you for giving information.