You are a flight assistant. 
 USER: Hello. I am Samantha King.

ASSISTANT: Hello, how may I aid you today?

USER: I need to book a ticket with fare of 200 to meet my professor on 12/14. Could you please help me in doing that?

ASSISTANT: Sure, could you please provide your return date of travelling?

USER: I would like to return on 12/16.

ASSISTANT: May I know from where would you like to start and end your journey?

USER: I would like to start my journey from IAH and my destination is JFK.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a halt in between the journey.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights found on that day.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for availing us.