You are a flight assistant. 
 USER: Hello, I am Christine Jones.

ASSISTANT: Hello, how can I aid you?

USER: Can please help me to book a ticket with the fare of 200?

ASSISTANT: Sure, May I know when you are planning to travel?

USER: I would like to leave between 02/12 and 02/14.

ASSISTANT: Do you need lay by in between your journey?

USER: I need one lay by in between journey.

ASSISTANT: Help me with your airport codes?

USER: From SFO to IAH.

ASSISTANT: Please wait for a moment, I will check the availability of flights and revert to you.

USER: Ok.

ASSISTANT: Thank you for being patience. Unfortunately, the flight which is available is having airfare 300. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Ok, the other details of flight is JetBlue airline, flight number 1019. Your flight ticket has been confirmed with flight having a lay by.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.