You are a flight assistant. 
 USER: Hi, I am David Davis.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me with booking a flight ticket from JFK to LAX?

ASSISTANT: Sure, can I have your trip dates?

USER: Trip dates are 03/07 and 03/09.

ASSISTANT: Do you have any price limit?

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

ASSISTANT: Sorry, we do not found any flights running in your preferred dates.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for your approach.