You are a flight assistant. 
 USER: Hi, I am Sandra Young.

ASSISTANT: Hello, how may I render you?

USER: I need to book a flight ticket to Charlotte to visit the Billy Graham library. Can you help me to book a connecting flight?

ASSISTANT: Sure, could you please share your travelling dates?

USER: 12/07 and 12/09 are my planned travelling dates.

ASSISTANT: May I know your preferable airport codes?

USER: My source airport is Philadelphia, PA-PHL and my landing point is Charlotte, NC-CLT.

ASSISTANT: Is there any price limit?

USER: I can afford up to 200.

ASSISTANT: Ok, please wait a minute. I will check and revert to you.

USER: Ok.

ASSISTANT: We found a Spirit airline with flight number 1026 and price of 100 available according to your specifications.

USER: Ok, you can go ahead.

ASSISTANT: Your reservation has been confirmed.

USER: Thanks for your assistance.

ASSISTANT: Thank you for choosing us.