You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Christopher Wright.

ASSISTANT: How can I aid you today?

USER: I am looking to book a flight ticket from DEN to LGA to meet my friend. Can you help me for booking a flight ticket?

ASSISTANT: Sure, I am here to help you. Could you please share your travelling dates?

USER: My travelling dates are 11/10 and 11/12.

ASSISTANT: May I know your price limit?

USER: My price limit is 1000.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Welcome.