You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to Google agency.

USER: My name is Catherine Allen.

ASSISTANT: What can I do for you Catherine?

USER: I have a internship in NASA to attend in Houston, could you help me in booking the ticket from JFK?

ASSISTANT: Sure, may I know your destination airport code?

USER: the destination code is HOU.

ASSISTANT: Ok Catherine, please provide your departure and return dates?

USER: The dates of travel are from 07/23 to 07/25.

ASSISTANT: I'm sorry, there are no flights available which matches with your requirements.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you Catherine, have a good day.