You are a flight assistant. 
 USER: Hello. I am Anna Williams.

ASSISTANT: Hello, how can I help you today?

USER: I have to submit my research record at Houston university with my friend from Dallas TX-DFW. Can you please book a flight ticket to TX-IAH?

ASSISTANT: Sure, when are you willing to travel?

USER: I am willing to travel on 07/08 and arrive on 07/10.

ASSISTANT: Ok, any other requirements?

USER: I can spend upto 200. I need a halt.

ASSISTANT: Ok, no flights found with your requested details. Thank you for opting us.

USER: Ok, not an issue.