You are a flight assistant. 
 USER: Hello, I am Amy Hernandez.

ASSISTANT: Hello, how may I serve you?

USER: I want to celebrate my friend marriage in febway park at Boston, MA - BOS. Can you please help me with book a direct flight?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: How much you can afford for this journey?

USER: I can afford for this journey up to 200.

ASSISTANT: Could you please share your boarding point?

USER: Sure, my boarding point is from Houston, TX - HOU.

ASSISTANT: Let me know your trip dates.

USER: My trip dates are 03/21 to 03/23.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no direct flight available with your given requirements.

USER: OK, no problem. Thanks for your information.

ASSISTANT: Thank you.