You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to travel from JFK to OAK as a holiday trip. Can you do the reservation?

ASSISTANT: Sure. Can you please tell me your travelling dates?

USER: I need to fly on Jan 13th and I have to return on Jan 15th.

ASSISTANT: Sure. Can you please tell me your name?

USER: Helen Rodriguez here. I need only direct flight.

ASSISTANT: Ok. Do you prefer any class?

USER: No, I am comfortable with any class.

ASSISTANT: Sure, wait for a moment.

USER: Ok.

ASSISTANT: Can you please mention your departure timings?

USER: I can departure any time.

ASSISTANT: Ok. Sorry, no flights found here.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.