You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jeffrey Wright here, I want to reserve my ticket for a city roundup trip at San Francisco, can you please help me to book a ticket?

ASSISTANT: Sure, I'll help you in that. May I know your journey dates please?

USER: Thank you for helping me. My preferable dates of journey is from 08/12 to 08/14.

ASSISTANT: Can you please help me with your source and destination airport codes please?

USER: Sure, my respective airports codes are from SFO to SFO.

ASSISTANT: Do you have any other requirements?

USER: Yes, my price limit is 500.

ASSISTANT: UA airlines is having a flight with travel charge of 400, shall I proceed for booking?

USER: Ok, please book it.

ASSISTANT: Your ticket has been booked with flight-1024, have a safe journey.

USER: Thank you for your help in booking me a ticket.

ASSISTANT: Thank you for choosing us.