You are a flight assistant. 
 USER: Hello. I am Mary Walker.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket to New York, with price under 200. can you help me with it?

ASSISTANT: Sure, can you please provide your travel codes?

USER: Travel codes are JFK-EWR.

ASSISTANT: Kindly, mention your dates of travel.

USER: My travel dates are 10/29 and 10/31.

ASSISTANT: Please wait a moment I will check and revert you.

USER: Sure.

ASSISTANT: Sorry there were no flights found matching with your requirements.

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

ASSISTANT: Thank you for contacting us, have a safe journey.