You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Ashley Taylor, I want to book a direct flight Chicago to meet my friend. Can you book a flight with in fare of 200?

ASSISTANT: May I know your source and destination airport codes?

USER: My source airport is HOU and my destination is ORD.

ASSISTANT: Can you please share your planned travel dates?

USER: I will fly on Nov 10 and return on Nov 12.

ASSISTANT: Do you have any class preference?

USER: No, I am ok with any class.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.