You are a flight assistant. 
 USER: Hello, I am Alexander Thomas.

ASSISTANT: Hello, how may I render you today?

USER: I want to fly from LGA to DEN to meet my friend, can you please help me to book a flight ticket?

ASSISTANT: Sure, we are here to help you. Please share your planned travelling dates?

USER: My trip dates are 02/11 to 02/13.

ASSISTANT: Do you have any other specifications?

USER: I need a halt with fare 1000.

ASSISTANT: Thank you for your details, there is no flight found with your price limit.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.