You are a flight assistant. 
 USER: Hi. Jason Lewis here.

ASSISTANT: Hello. How may I help you?

USER: I would like to prefer a flight with lay-by option for my business trip to San Francisco. Can you book the flight ticket?

ASSISTANT: Do you have any specific time preference?

USER: No.

ASSISTANT: Please let me know your journey dates?

USER: The travel dates are from June 11 to June 13.

ASSISTANT: Is there any other requirement?

USER: No.

ASSISTANT: May I know your airport codes?

USER: The airport codes are from MSP to SFO.

ASSISTANT: Can I know your name?

USER: I am Jason Lewis.

ASSISTANT: Ok. Found ticket with United airlines for price 100 having flight number 1003.

USER: I am fine with the airlines. You can book it.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.