You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I want to book a flight ticket to Houston, TX - IAH to meet my uncle. Can you please help me for booking with a fare of 200?

ASSISTANT: Sure, I am here to help you. May I know your depart date and arrival dates?

USER: My planned journey dates are 11/23 to 11/25.

ASSISTANT: Kindly share your source code.

USER: Sure, my source is Atlanta, GA -ATL.

ASSISTANT: Thanks for the information. There is no flight available matching with your requirements.

USER: That's Ok, thanks for your response.

ASSISTANT: Let me know your name.

USER: Sure, my name is Karen Phillips.

ASSISTANT: Thank you.