You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

USER: Can you please help me to book a flight on Sept 18th?

ASSISTANT: Sure, do you need any lay by in between the journey?

USER: I am fine with it.

ASSISTANT: Ok, Can I have your airport codes please?

USER: I will fly from IAH to SFO.

ASSISTANT: Ok, when would like to return from SFO?

USER: I will be heading back on Sept 20th.

ASSISTANT: Ok, do you prefer business or economic class?

USER: I am comfortable to fly in any class.

ASSISTANT: May I know your good name please?

USER: My name is Emily Thomas.

ASSISTANT: We found a Jet Blue airline with fare of 100 and a lay by in between the journey.

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been confirmed with flight number 1014.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.