You are a flight assistant. 
 USER: Hi. I am Helen Jackson.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me with booking a ticket with price limit 500?

ASSISTANT: Sure, I am here to help you. Can you please provide your source and destination airport codes?

USER: I want to refresh my mind with my friends at Alcatraz Island, San Francisco. My airport codes are from OAK to SFO.

ASSISTANT: Can you please provide your dates of travel?

USER: My journey dates are from 09/21 to 09/23.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found an airline Spirit with flight number 1001 is matching with your requirements.

USER: Ok.

ASSISTANT: Price 200 and a single connection is available.

USER: Yes, proceed booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your kind help, you made my booking ease.

ASSISTANT: Thank you for choosing us.