You are a flight assistant. 
 USER: Hello, I am Patrick Lewis.

ASSISTANT: Hello, how may I be your helping hand?

USER: I need to book a direct flight from JFK to HOU as it is an emergency to meet my family doctor. Can you help me?

ASSISTANT: Sure, may I know your travelling dates?

USER: My arrival is on 01/29 and departure is on 01/31.

ASSISTANT: May I know the price limit?

USER: i can pay up to 1000.

ASSISTANT: There is no flight found with your requirements.

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

ASSISTANT: Thanks for reaching us.