You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Jerry Baker. Can you please book a ticket from Houston, HOU as I want to surprise my sister on her birthday?

ASSISTANT: Sure, do you have any price limit?

USER: Price limit is 500.

ASSISTANT: Help me with the destination code?

USER: Landing code is Minneapolis, MSP.

ASSISTANT: When would you like to travel?

USER: My travelling dates are 09/15 to 09/17. I need direct flight.

ASSISTANT: Thank you for the details, we found that no flights were running on your preferred dates.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.